CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (13,430)	$ (13,478)	$ (12,394)	$ 43,312
Other comprehensive income (loss):
Change in fair value of interest rate swaps	0	(22)	0	(132)
Net loss reclassified into income on settlement of interest rate swaps	0	265	119	798
Other comprehensive income	0	243	119	666
Total comprehensive income (loss)	$ (13,430)	$ (13,235)	$ (12,275)	$ 43,978