Schedule of Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Balance at December 31, 2015			$ 664,160
Other comprehensive loss	$ (108)	$ (6,155)	(776)	$ (7,935)
Stock compensation			3,432
Acquisition of AltAir			39,101
Distributions to non-controlling interest in the Partnership			(921)
Dividends			(21,399)
Net loss	(20,630)	$ 47,862	(56,690)	$ 81,917
Balance at June 30, 2016	626,907		626,907
Parent
Balance at December 31, 2015			639,138
Other comprehensive loss			(775)
Stock compensation			3,641
Acquisition of AltAir			0
Distributions to non-controlling interest in the Partnership			0
Dividends			(21,155)
Net loss			(55,907)
Balance at June 30, 2016	564,942		564,942
Noncontrolling Interest
Balance at December 31, 2015			25,022
Other comprehensive loss			(1)
Stock compensation			(209)
Acquisition of AltAir			39,101
Distributions to non-controlling interest in the Partnership			(921)
Dividends			(244)
Net loss			(783)
Balance at June 30, 2016	$ 61,965		$ 61,965