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	$ 22,427	$ 12,080	$ 13,929
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and software and leasehold amortization	27,399	23,081	20,391
Amortization of intangible assets	26,588	21,323	9,190
Fair value adjustment to contingent consideration	(17,188)	(7,166)
Intangible asset impairment expense	1,777	1,278
Share-based compensation expense	6,719	7,369	6,727
Provision for bad debts	2,223	2,303	2,146
Accretion of discount	1,162	212	98
Deferred income tax expense	1,473	2,430	(87)
Benefit related to embedded option			(738)
Other, net	611	999	365
Changes in operating assets and liabilities, net of effects from business acquisitions:
Trade accounts receivable	(17,123)	(9,029)	(17,011)
Prepaid expenses and other assets	2,833	40	18
Accounts payable and other liabilities	1,462	(5,238)	(12)
Customer deposits	14,122	(581)	(443)
Excess tax benefit related to share-based compensation		(77)
Other	(750)	1,659	(136)
Net cash provided by operating activities	73,735	50,683	34,437
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(16,025)	(12,320)	(11,092)
Internally developed software costs	(6,467)	(6,320)	(8,131)
Payment of deferred acquisition consideration	(8,400)
Cash paid for business acquisitions, net of cash acquired		(166,930)	(51,548)
Cash proceeds from sale of property and equipment	499
Other investing activities, net	186	106	11
Net cash used in investing activities	(30,207)	(185,464)	(70,760)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolver borrowings	65,000	214,000	78,000
Payments to reduce revolver borrowings	(83,000)	(64,000)	(11,000)
Debt issuance costs		(1,940)	(1,460)
Payments under long-term obligations	(7,163)	(2,953)	(27,508)
Excess tax benefit related to share-based compensation		77
Common stock repurchases (Note 7)	(5,988)	(10,858)	(44,160)
Cash dividends paid (Note 7)	(12,386)	(5,514)	(2,632)
Proceeds from issuance of common stock under share-based compensation plans	884	2,857	1,460
Net cash (used in) provided by financing activities	(42,653)	131,669	(7,300)
Effect of exchange rate changes on cash	95	511	76
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	970	(2,601)	(43,547)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	2,838	5,439	48,986
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 3,808	$ 2,838	$ 5,439