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Notes Payable, Revolving Credit Facility, Interest and Amortization of Deferred Debt Costs - Interest Expense and Amortization of Deferred Debt Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Debt Disclosure [Abstract]        
Interest incurred $ 11,691 $ 11,489 $ 35,027 $ 34,287
Amortization of deferred debt costs 339 340 1,003 1,094
Capitalized interest (506) (600) (1,762) (1,393)
Interest expense and amortization of deferred debt costs $ 11,524 $ 11,229 $ 34,268 $ 33,988