Annual report pursuant to Section 13 and 15(d)

Deferred Leasing and Financing Costs (Details)

v2.4.1.9
Deferred Leasing and Financing Costs (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred Leasing and Financing Costs [Abstract]    
Deferred leasing costs $ 123,925us-gaap_DeferredCostsLeasingGross $ 110,711us-gaap_DeferredCostsLeasingGross
Deferred financing costs 31,229us-gaap_DeferredFinanceCostsGross 36,390us-gaap_DeferredFinanceCostsGross
Accumulated amortization (90,357)ofc_DeferredLeasingAndFinancingCostsAccumulatedAmortization (80,834)ofc_DeferredLeasingAndFinancingCostsAccumulatedAmortization
Deferred leasing and financing costs, net $ 64,797us-gaap_DeferredCostsCurrentAndNoncurrent $ 66,267us-gaap_DeferredCostsCurrentAndNoncurrent