Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Consolidated Statements of Comprehensive Income
Net income (loss)	$ (492)	$ 2,214	$ 1,806	$ 6,545
Derivative instruments
Reclassification adjustment for gains included in net income		(124)		(249)
Net loss recognized in other comprehensive income		(124)		(249)
Tax benefit related to items of other comprehensive income		46		91
Other comprehensive loss		(78)		(158)
Total comprehensive income (loss)	$ (492)	$ 2,136	$ 1,806	$ 6,387