CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 3,947	$ 7,062	$ 12,631	$ 17,671
Other comprehensive income
Mark-to-market of interest rate hedges, net of tax expenses (benefit) of $59 and ($106), respectively, for the quarters, and $193 and ($33), respectively, for the nine month periods	104	(184)	338	(57)
Total other comprehensive income (loss)	104	(184)	338	(57)
Comprehensive income	$ 4,051	$ 6,878	$ 12,969	$ 17,614