Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Consolidated Statements of Comprehensive Income
Net income	$ 4,331	$ 1,610
Derivative instruments
Unrealized gain on derivative instruments		9
Reclassification adjustment for (gains) losses included in net income	(125)	366
Net gain (loss) recognized in other comprehensive income (loss)	(125)	375
Tax benefit (expense) related to items of other comprehensive income	46	(137)
Other comprehensive income (loss)	(79)	238
Total comprehensive income	$ 4,252	$ 1,848