Notes Payable - Deferred Financing Costs, Loss On Extinguishment of Debt and Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Financing Costs and Losses on Extinguishment of Debt
Payments of deferred financing costs		$ 4,012	$ 3,537
Loss on extinguishment of debt		835	824
Interest Expense
Noncash interest on derivatives and finance lease obligations, net	$ 6,051	(1,190)	3,106
Amortization of deferred financing costs	2,791	2,947	2,409
Total interest expense	54,223	47,690	51,766
Notes payable [Member]
Interest Expense
Interest expense on debt and finance lease obligations	45,381	45,933	46,251
Noncash interest on derivatives and finance lease obligations, net	6,051	(1,190)	3,106
Amortization of deferred financing costs	2,791	2,947	2,409
Total interest expense	$ 54,223	$ 47,690	$ 51,766