CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 17,284	$ 20,802	$ 30,713
Adjustments to reconcile income to net cash provided by operating activities:
Depreciation and amortization	2,578	2,816	2,913
Provision for uncollectible accounts	2,825	2,355	3,691
Stock-based compensation	1,473	1,422	1,505
Deferred income taxes	3,753	4,371	2,770
Net cash provided by operating activities	27,913	31,766	41,592
(Increase) decrease in:
Accounts receivable	(8,228)	(1,641)	(8,255)
Prepaid expenses and other current assets	(1,137)	633	(434)
Other assets	236	252	(682)
(Decrease) increase in:
Accounts payable and accrued expenses	(1,751)	(5,075)	2,548
Net cash provided by operating activities	17,033	25,935	34,769
Cash flows from investing activities:
Capital expenditures	(2,487)	(2,890)	(2,607)
Acquisitions, net of cash acquired	(538)	(38,064)	(2,800)
Net cash used in investing activities	(3,025)	(40,954)	(5,407)
Cash flows from financing activities:
Proceeds from stock option exercises	70	288	380
Purchase of common stock in connection with share awards	(1,889)	(440)	(640)
Tax benefit from stock-based compensation		1,614	1,233
Payment of special dividend	(18,562)
Principal payments on notes payable	(1,200)	(693)	(1,781)
Net cash used in financing activities	(21,581)	769	(808)
Net (decrease) increase in cash and cash equivalents	(7,573)	(14,250)	28,554
Cash and cash equivalents at beginning of period	33,693	47,943	19,389
Cash and cash equivalents at end of period	26,120	33,693	47,943
Supplemental disclosures of cash flow information:
Cash payment of interest, net of amounts capitalized	104	180	266
Cash payment of taxes	8,352	8,778	17,954
Summary of non-cash investing and financing activities:
Settlement of Directors Deferred Compensation Plan		501
Acquisitions funded by notes payable		1,000	125
Dividends declared, not paid	$ 86