Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Cash provided by operating activities	$ 8,798	$ 5,885
Cash flows from investing activities:
Acquisition of property and equipment	(1,189)	(1,145)
Other investing activities	(75)	(66)
Net cash used in investing activities	(1,264)	(1,211)
Cash flows from financing activities:
Payments on long-term debt	(7,750)	(4,000)
Purchase of shares held in treasury	(80)	(117)
Net cash used in financing activities	(7,830)	(4,117)
Net (decrease) increase in cash and cash equivalents	(296)	557
Cash and cash equivalents, beginning of period	6,991	12,197
Cash and cash equivalents, end of period	$ 6,695	$ 12,754