Notes Payable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest incurred and expensed on the notes payable
Loss (gain) on derivatives, net			$ 12	$ (395)
Amortization and write-off of deferred financing fees			2,472	2,145
Total interest incurred and expensed on debt and capital lease obligations	$ 16,405	$ 18,052	51,020	54,666
Notes payable and capital lease obligations
Interest incurred and expensed on the notes payable
Interest expense on debt and capital lease obligations	15,711	17,540	48,536	52,916
Loss (gain) on derivatives, net	2	(161)	12	(395)
Amortization and write-off of deferred financing fees	692	673	2,472	2,145
Total interest incurred and expensed on debt and capital lease obligations	$ 16,405	$ 18,052	$ 51,020	$ 54,666