Notes Payable (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Financing Fees and Losses on Extinguishment of Debt
Payments of deferred financing fees	$ 5,861	$ 2,346	$ 243
Write-off of deferred financing fees	455
Loss on extinguishment of debt, continuing operations	2,964	4,638	44
Loss on extinguishment of debt	2,964	4,638	3,159
Interest incurred and expensed on the notes payable
Gain on derivatives, net	(309)	(529)	(525)
Accretion of Senior Notes			3
Write-off of deferred financing fees	455
Total interest incurred and expensed on debt and capital lease obligations	66,516	72,315	72,239
Notes payable and capital lease obligations
Interest incurred and expensed on the notes payable
Interest expense on debt and capital lease obligations	63,677	70,067	69,806
Gain on derivatives, net	(309)	(529)	(525)
Amortization and write-off of deferred financing fees	3,148	2,777	2,955
Accretion of Senior Notes			3
Total interest incurred and expensed on debt and capital lease obligations	$ 66,516	$ 72,315	$ 72,239