CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (5,943)	$ (3,561)	$ (11,518)	$ 3,165
Other comprehensive income (loss):
Unrealized losses on derivative instruments	(44)	(5,139)	(6,353)	(7,332)
Reclassification adjustment realized in net income (effective portion)	1,716	1,481	3,367	2,443
Total other comprehensive income (loss)	1,672	(3,658)	(2,986)	(4,889)
Total comprehensive loss	$ (4,271)	$ (7,219)	$ (14,504)	$ (1,724)