Quarterly report pursuant to Section 13 or 15(d)

Debt, Net (Details)

v3.7.0.1
Debt, Net (Details) - USD ($)
 3 Months Ended 6 Months Ended
May 01, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Debt            
Carrying Value   $ 1,897,734,000   $ 1,897,734,000   $ 1,904,001,000
Deferred financing costs, net   1,747,000   1,747,000   3,128,000
Interest costs capitalized   1,600,000 $ 1,300,000 3,100,000 $ 3,100,000  
Secured Debt            
Debt            
Carrying Value   165,732,000   165,732,000   167,591,000
Loans payable            
Debt            
Deferred financing costs, net   5,000,000   5,000,000   6,100,000
Term Loan Facilities Maturing 2020            
Debt            
Repayments of Long-term Debt $ 200,000,000          
Fixed rate debt | Secured Debt            
Debt            
Carrying Value   152,449,000   152,449,000   154,143,000
Unamortized premium included in carrying value   $ 385,000   $ 385,000   422,000
Weighted average interest rate (as a percent)   4.19%   4.19%    
Fixed rate debt | Secured Debt | Minimum            
Debt            
Stated interest rate (as a percent)   3.82%   3.82%    
Fixed rate debt | Secured Debt | Maximum            
Debt            
Stated interest rate (as a percent)   7.87%   7.87%    
Variable-rate debt            
Debt            
Description of variable rate basis       LIBOR    
Variable-rate debt | Secured Debt            
Debt            
Carrying Value   $ 13,283,000   $ 13,283,000   13,448,000
Stated interest rate (as a percent)   2.90%   2.90%    
Variable-rate debt | Secured Debt | London Interbank Offered Rate (LIBOR)            
Debt            
Variable rate, spread (as a percent)       1.85%    
Revolving Credit Facility            
Debt            
Carrying Value   $ 194,000,000   $ 194,000,000   0
Description of variable rate basis       LIBOR    
Weighted average interest rate (as a percent)   2.39%   2.39%    
Revolving Credit Facility | Minimum | London Interbank Offered Rate (LIBOR)            
Debt            
Variable rate, spread (as a percent)       0.875%    
Revolving Credit Facility | Maximum | London Interbank Offered Rate (LIBOR)            
Debt            
Variable rate, spread (as a percent)       1.60%    
Term Loan Facilities            
Debt            
Carrying Value   $ 348,283,000   $ 348,283,000   547,494,000
Description of variable rate basis       LIBOR    
Weighted average interest rate (as a percent)   2.75%   2.75%    
Aggregate additional borrowing capacity available   $ 350,000,000   $ 350,000,000    
Term Loan Facilities | Minimum | London Interbank Offered Rate (LIBOR)            
Debt            
Variable rate, spread (as a percent)       0.90%    
Term Loan Facilities | Maximum | London Interbank Offered Rate (LIBOR)            
Debt            
Variable rate, spread (as a percent)       2.40%    
3.60% Senior Notes | Unsecured senior notes            
Debt            
Carrying Value   347,338,000   $ 347,338,000   347,128,000
Debt instrument, face amount   $ 350,000,000   $ 350,000,000    
Stated interest rate (as a percent)   3.60%   3.60%    
Unamortized discount included in carrying value   $ 1,800,000   $ 1,800,000   2,000,000
Interest rate on debt (as a percent)   3.70%   3.70%    
5.250% Senior Notes | Unsecured senior notes            
Debt            
Carrying Value   $ 246,408,000   $ 246,408,000   246,176,000
Debt instrument, face amount   $ 250,000,000   $ 250,000,000    
Stated interest rate (as a percent)   5.25%   5.25%    
Unamortized discount included in carrying value   $ 3,200,000   $ 3,200,000   3,400,000
Interest rate on debt (as a percent)   5.49%   5.49%    
3.70% Senior Notes | Unsecured senior notes            
Debt            
Carrying Value   $ 298,080,000   $ 298,080,000   297,843,000
Debt instrument, face amount   $ 300,000,000   $ 300,000,000    
Stated interest rate (as a percent)   3.70%   3.70%    
Unamortized discount included in carrying value   $ 1,500,000   $ 1,500,000   1,700,000
Interest rate on debt (as a percent)   3.85%   3.85%    
5.000% Senior Notes | Unsecured senior notes            
Debt            
Carrying Value   $ 296,547,000   $ 296,547,000   296,368,000
Debt instrument, face amount   $ 300,000,000   $ 300,000,000    
Stated interest rate (as a percent)   5.00%   5.00%    
Unamortized discount included in carrying value   $ 2,900,000   $ 2,900,000   3,000,000
Interest rate on debt (as a percent)   5.15%   5.15%    
Unsecured notes payable            
Debt            
Carrying Value   $ 1,346,000   $ 1,346,000   1,401,000
Stated interest rate (as a percent)   0.00%   0.00%    
Unamortized discount included in carrying value   $ 416,000   $ 416,000   $ 460,000