Shareholders' Equity - Noncontrolling Interest Activity in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Class of Stock [Line Items]
Income (loss) allocated to noncontrolling interest	$ 7,316	$ 3,109	$ 10,391	$ 10,795
Class A Units
Class of Stock [Line Items]
Income (loss) allocated to noncontrolling interest	(27)	(1,575)	108	(3,241)
Series C Convertible Units
Class of Stock [Line Items]
Income (loss) allocated to noncontrolling interest	0	4,698	3,027	14,094
Series D Convertible Units
Class of Stock [Line Items]
Income (loss) allocated to noncontrolling interest	0	0	133	0
Beneficial conversion feature	7,569	0	7,569	0
Consolidated Subsidiaries With Noncontrolling Interest [Member]
Class of Stock [Line Items]
Income (loss) allocated to noncontrolling interest	$ (226)	$ (14)	$ (446)	$ (58)