Consolidated Statements of Equity - USD ($) $ in Thousands |
Total |
Forward Equity Sale Agreement |
Common Shares |
Common Shares
Forward Equity Sale Agreement
|
Additional Paid-in Capital |
Additional Paid-in Capital
Forward Equity Sale Agreement
|
Cumulative Distributions in Excess of Net Income |
Accumulated Other Comprehensive Loss |
Noncontrolling Interests |
Corporate Office Properties, L.P. |
Corporate Office Properties, L.P.
Forward Equity Sale Agreement
|
Corporate Office Properties, L.P.
Common Shares
|
Corporate Office Properties, L.P.
Common Shares
Forward Equity Sale Agreement
|
Corporate Office Properties, L.P.
Accumulated Other Comprehensive Loss
|
Corporate Office Properties, L.P.
Noncontrolling Interests
|
Corporate Office Properties, L.P.
Limited Partner
|
Corporate Office Properties, L.P.
Limited Partner
Preferred Shares
|
Cumulative Effect, Period Of Adoption, Adjustment |
Cumulative Effect, Period Of Adoption, Adjustment
Cumulative Distributions in Excess of Net Income
|
Cumulative Effect, Period Of Adoption, Adjustment
Corporate Office Properties, L.P.
|
Cumulative Effect, Period Of Adoption, Adjustment
Corporate Office Properties, L.P.
Common Shares
|
Cumulative Effect, Period of Adoption, Adjusted Balance |
Cumulative Effect, Period of Adoption, Adjusted Balance
Common Shares
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Additional Paid-in Capital
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Cumulative Distributions in Excess of Net Income
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Noncontrolling Interests
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Corporate Office Properties, L.P.
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Corporate Office Properties, L.P.
Common Shares
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Corporate Office Properties, L.P.
Accumulated Other Comprehensive Loss
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Corporate Office Properties, L.P.
Noncontrolling Interests
|
Cumulative Effect, Period of Adoption, Adjusted Balance
Corporate Office Properties, L.P.
Limited Partner
Preferred Shares
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Balance, preferred units (in share/units) at Dec. 31, 2018 | 352,000 | |||||||||||||||||||||||||||||||
| Balance at Dec. 31, 2018 | $ 1,627,048 | $ 1,102 | $ 2,431,355 | $ (846,808) | $ (238) | $ 41,637 | $ 1,627,048 | $ 1,604,655 | $ (121) | $ 13,714 | $ 8,800 | |||||||||||||||||||||
| Balance (in units/ shares) at Dec. 31, 2018 | 110,241,868 | 111,574,754 | ||||||||||||||||||||||||||||||
| Increase (Decrease) in Shareholders' Equity | ||||||||||||||||||||||||||||||||
| Conversion of common units to common shares | $ 0 | 1 | 1,555 | (1,556) | ||||||||||||||||||||||||||||
| Redemption of common units (in units) | (924) | |||||||||||||||||||||||||||||||
| Redemption of common units | (25) | (25) | (25) | $ (25) | ||||||||||||||||||||||||||||
| Redemption of vested equity awards | $ (1,973) | (1,973) | (1,973) | $ (1,973) | ||||||||||||||||||||||||||||
| Issuance of common units resulting from common shares issued under COPT forward equity sale agreements (in units) | 1,614,087 | 1,614,087 | ||||||||||||||||||||||||||||||
| Common shares issued under sale agreements and programs | $ 46,454 | $ 16 | $ 46,438 | $ 46,454 | $ 46,454 | |||||||||||||||||||||||||||
| Share-based compensation issuance, net of redemptions (in units) | 100,181 | 355,683 | ||||||||||||||||||||||||||||||
| Share-based compensation issuance, net of redemptions | $ 5,530 | 2 | 4,574 | 954 | 5,530 | $ 5,530 | ||||||||||||||||||||||||||
| Adjustments to noncontrolling interests resulting from changes in ownership of COPLP | 0 | (522) | 522 | |||||||||||||||||||||||||||||
| Comprehensive income / loss | 117,527 | 148,907 | (34,342) | 2,962 | 117,527 | 150,770 | (34,770) | 1,040 | 487 | |||||||||||||||||||||||
| Dividends/Distributions | (92,334) | (92,334) | (93,954) | (93,467) | $ (487) | |||||||||||||||||||||||||||
| Distributions to owners of common and preferred units in COPLP | (1,620) | (1,620) | ||||||||||||||||||||||||||||||
| Contributions from noncontrolling interests in other consolidated entities | 2,570 | 2,570 | 2,570 | 2,570 | ||||||||||||||||||||||||||||
| Distributions to noncontrolling interests in other consolidated entities/subsidiaries | (5,886) | (5,886) | (5,886) | (5,886) | ||||||||||||||||||||||||||||
| Adjustment to arrive at fair value of redeemable noncontrolling interests | (1,344) | (1,344) | (1,344) | (1,344) | ||||||||||||||||||||||||||||
| Balance, preferred units (in shares/units) at Sep. 30, 2019 | 352,000 | |||||||||||||||||||||||||||||||
| Balance at Sep. 30, 2019 | $ 1,695,947 | 1,121 | 2,480,083 | (790,235) | (34,580) | 39,558 | 1,695,947 | $ 1,710,600 | (34,891) | 11,438 | $ 8,800 | |||||||||||||||||||||
| Balance (in units/ shares) at Sep. 30, 2019 | 112,059,175 | 113,543,600 | ||||||||||||||||||||||||||||||
| Balance, preferred units (in share/units) at Jun. 30, 2019 | 352,000 | |||||||||||||||||||||||||||||||
| Balance at Jun. 30, 2019 | $ 1,719,111 | 1,119 | 2,475,293 | (780,667) | (23,465) | 46,831 | 1,719,111 | $ 1,716,912 | (23,638) | 17,037 | $ 8,800 | |||||||||||||||||||||
| Balance (in units/ shares) at Jun. 30, 2019 | 111,949,887 | 113,532,731 | ||||||||||||||||||||||||||||||
| Increase (Decrease) in Shareholders' Equity | ||||||||||||||||||||||||||||||||
| Conversion of common units to common shares | $ 0 | 1 | 1,475 | (1,476) | ||||||||||||||||||||||||||||
| Redemption of common units (in units) | (880) | |||||||||||||||||||||||||||||||
| Redemption of common units | (24) | (24) | (24) | $ (24) | ||||||||||||||||||||||||||||
| Redemption of vested equity awards | $ (53) | (53) | (53) | $ (53) | ||||||||||||||||||||||||||||
| Share-based compensation issuance, net of redemptions (in units) | 11,749 | 11,749 | ||||||||||||||||||||||||||||||
| Share-based compensation issuance, net of redemptions | $ 1,895 | 1 | 1,525 | 369 | 1,895 | $ 1,895 | ||||||||||||||||||||||||||
| Adjustments to noncontrolling interests resulting from changes in ownership of COPLP | 0 | 312 | (312) | |||||||||||||||||||||||||||||
| Comprehensive income / loss | 10,707 | 21,257 | (11,115) | 565 | 10,707 | 21,524 | (11,253) | 279 | 157 | |||||||||||||||||||||||
| Dividends/Distributions | (30,825) | (30,825) | (31,342) | (31,185) | $ (157) | |||||||||||||||||||||||||||
| Distributions to owners of common and preferred units in COPLP | (517) | (517) | ||||||||||||||||||||||||||||||
| Distributions to noncontrolling interests in other consolidated entities/subsidiaries | (5,878) | (5,878) | (5,878) | (5,878) | ||||||||||||||||||||||||||||
| Adjustment to arrive at fair value of redeemable noncontrolling interests | 1,531 | 1,531 | 1,531 | 1,531 | ||||||||||||||||||||||||||||
| Balance, preferred units (in shares/units) at Sep. 30, 2019 | 352,000 | |||||||||||||||||||||||||||||||
| Balance at Sep. 30, 2019 | $ 1,695,947 | 1,121 | 2,480,083 | (790,235) | (34,580) | 39,558 | 1,695,947 | $ 1,710,600 | (34,891) | 11,438 | $ 8,800 | |||||||||||||||||||||
| Balance (in units/ shares) at Sep. 30, 2019 | 112,059,175 | 113,543,600 | ||||||||||||||||||||||||||||||
| Balance, preferred units (in share/units) at Dec. 31, 2019 | 352,000 | 352,000 | 352,000 | |||||||||||||||||||||||||||||
| Balance at Dec. 31, 2019 | $ 1,719,245 | 1,121 | 2,481,558 | (778,275) | (25,444) | 40,285 | 1,719,245 | $ 1,724,159 | (25,648) | 11,934 | $ 8,800 | $ (5,541) | $ (5,541) | $ (5,541) | $ (5,541) | $ 1,713,704 | $ 1,121 | $ 2,481,558 | $ (783,816) | $ (25,444) | $ 40,285 | $ 1,713,704 | $ 1,718,618 | $ (25,648) | $ 11,934 | $ 8,800 | ||||||
| Balance (in units/ shares) at Dec. 31, 2019 | 112,068,705 | 113,551,130 | 1,482,425 | 113,551,130 | ||||||||||||||||||||||||||||
| Increase (Decrease) in Shareholders' Equity | ||||||||||||||||||||||||||||||||
| Conversion of common units to common shares | $ 0 | 182 | (182) | |||||||||||||||||||||||||||||
| Redemption of vested equity awards | $ (1,629) | (1,629) | (1,629) | $ (1,629) | ||||||||||||||||||||||||||||
| Share-based compensation issuance, net of redemptions (in units) | 94,974 | 252,979 | ||||||||||||||||||||||||||||||
| Share-based compensation issuance, net of redemptions | $ 4,730 | 1 | 3,394 | 1,335 | 4,730 | $ 4,730 | ||||||||||||||||||||||||||
| Adjustments to noncontrolling interests resulting from changes in ownership of COPLP | 0 | 527 | (527) | |||||||||||||||||||||||||||||
| Comprehensive income / loss | 31,295 | 15,706 | 14,896 | 693 | 31,295 | 15,891 | 15,085 | 88 | 231 | |||||||||||||||||||||||
| Dividends/Distributions | (92,537) | (92,537) | (93,843) | (93,612) | $ (231) | |||||||||||||||||||||||||||
| Distributions to owners of common and preferred units in COPLP | (1,306) | (1,306) | ||||||||||||||||||||||||||||||
| Contributions from noncontrolling interests in other consolidated entities | 112 | 112 | 112 | 112 | ||||||||||||||||||||||||||||
| Distributions to noncontrolling interests in other consolidated entities/subsidiaries | (22) | (22) | (22) | (22) | ||||||||||||||||||||||||||||
| Adjustment to arrive at fair value of redeemable noncontrolling interests | (4,711) | (4,711) | (4,711) | (4,711) | ||||||||||||||||||||||||||||
| Balance, preferred units (in shares/units) at Sep. 30, 2020 | 352,000 | 352,000 | ||||||||||||||||||||||||||||||
| Balance at Sep. 30, 2020 | $ 1,649,636 | 1,122 | 2,479,321 | (860,647) | (10,548) | 40,388 | 1,649,636 | $ 1,639,287 | (10,563) | 12,112 | $ 8,800 | |||||||||||||||||||||
| Balance (in units/ shares) at Sep. 30, 2020 | 112,175,688 | 113,804,109 | 1,628,421 | |||||||||||||||||||||||||||||
| Balance, preferred units (in share/units) at Jun. 30, 2020 | 352,000 | |||||||||||||||||||||||||||||||
| Balance at Jun. 30, 2020 | $ 1,656,924 | 1,122 | 2,477,977 | (797,959) | (64,513) | 40,297 | 1,656,924 | $ 1,701,375 | (65,183) | 11,932 | $ 8,800 | |||||||||||||||||||||
| Balance (in units/ shares) at Jun. 30, 2020 | 112,183,192 | 113,811,613 | ||||||||||||||||||||||||||||||
| Increase (Decrease) in Shareholders' Equity | ||||||||||||||||||||||||||||||||
| Redemption of vested equity awards | $ (57) | (57) | (57) | $ (57) | ||||||||||||||||||||||||||||
| Share-based compensation issuance, net of redemptions (in units) | (7,504) | (7,504) | ||||||||||||||||||||||||||||||
| Share-based compensation issuance, net of redemptions | $ 1,784 | 1,223 | 561 | 1,784 | $ 1,784 | |||||||||||||||||||||||||||
| Adjustments to noncontrolling interests resulting from changes in ownership of COPLP | 0 | 552 | (552) | |||||||||||||||||||||||||||||
| Comprehensive income / loss | 22,653 | (31,845) | 53,965 | 533 | 22,653 | (32,231) | 54,620 | 187 | 77 | |||||||||||||||||||||||
| Dividends/Distributions | (30,843) | (30,843) | (31,287) | (31,210) | $ (77) | |||||||||||||||||||||||||||
| Distributions to owners of common and preferred units in COPLP | (444) | (444) | ||||||||||||||||||||||||||||||
| Distributions to noncontrolling interests in other consolidated entities/subsidiaries | (7) | (7) | (7) | (7) | ||||||||||||||||||||||||||||
| Adjustment to arrive at fair value of redeemable noncontrolling interests | (374) | (374) | (374) | (374) | ||||||||||||||||||||||||||||
| Balance, preferred units (in shares/units) at Sep. 30, 2020 | 352,000 | 352,000 | ||||||||||||||||||||||||||||||
| Balance at Sep. 30, 2020 | $ 1,649,636 | $ 1,122 | $ 2,479,321 | $ (860,647) | $ (10,548) | $ 40,388 | $ 1,649,636 | $ 1,639,287 | $ (10,563) | $ 12,112 | $ 8,800 | |||||||||||||||||||||
| Balance (in units/ shares) at Sep. 30, 2020 | 112,175,688 | 113,804,109 | 1,628,421 |