CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 16,423	$ 22,186	$ 18,040
Other comprehensive income (loss)
Mark to market of interest rate hedges, net of tax expense (benefit) of $312, $89 and ($182) for 2012, 2011 and 2010, respectively	545	157	(321)
Minimum pension liability adjustments, net of tax expense (benefit) of $36, ($85) and $17, for 2012, 2011 and 2010, respectively	64	(149)	30
Total other comprehensive income (loss)	609	8	(291)
Comprehensive income	$ 17,032	$ 22,194	$ 17,749