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	$ 31,146	$ 28,007	$ 24,514
Adjustments to reconcile net income to net cash provided by operating activities:
(Gain) loss from discontinued operations activities, net of tax	(71)	577	3,640
Gain on sale of operations, net	(2,766)	(2,920)	(466)
Loss on redemption of convertible bonds			1,996
Asset impairments			263
Depreciation and amortization expense	21,395	20,345	20,332
Amortization of discount on notes and deferred financing costs	4,227	4,820	5,462
Amortization of discount on contingent earnout liability	181	186	177
Provision for credit losses and bad debt, net of recoveries	5,129	6,559	4,453
Adjustment to contingent earnout liability	(1,135)	(3,479)	(1,516)
Deferred income taxes	(1,721)	(2,899)	(2,079)
Employee stock awards	5,888	5,954	5,306
Excess tax benefits from share based payment arrangements		(171)	(196)
Changes in assets and liabilities, net of acquisitions and divestitures:
Restricted cash	518	333	(416)
Accounts receivable, net	(14,235)	(1,570)	(12,763)
Other assets	(5,595)	448	1,301
Accounts payable	4,135	4,212	5,312
Income taxes payable	4,786	(1,176)	(1,054)
Accrued personnel costs	5,258	560	(1,259)
Other liabilities	(3,339)	(1,019)	2,819
Net cash provided by continuing operations	53,801	58,767	55,826
Operating cash flows provided by (used in) discontinued operations	247	(593)	(2,641)
Net cash provided by operating activities	54,048	58,174	53,185
Cash flows from investing activities:
Business acquisitions and contingent consideration, net of cash acquired	(93,310)	(27,515)	(49,402)
Purchases of client fund investments	(5,742)	(19,643)	(15,840)
Proceeds from the sales and maturities of client fund investments	6,926	11,507	10,700
Proceeds on sales of divested and discontinued operations	1,540	1,036	8,060
(Increase) decrease in funds held for clients	(6,256)	(16,734)	19,052
Additions to property and equipment, net	(4,067)	(4,259)	(2,682)
Payments on notes receivable, net	(3,384)	58	18
Other	(22)	(22)	(19)
Net cash used in investing activities	(104,315)	(55,572)	(30,113)
Cash flows from financing activities:
Proceeds from bank debt	549,450	484,150	554,955
Payment of bank debt	(485,550)	(458,050)	(546,055)
Proceeds from issuance of convertible notes			130,000
Repurchase of convertible notes		(39,250)	(60,000)
Payment for acquisition of treasury stock	(5,716)	(9,513)	(86,209)
Increase (decrease) in client funds obligations	5,126	22,438	(13,912)
Payment of contingent consideration of acquisitions	(13,183)	(1,824)	(2,971)
Proceeds from exercise of stock options		768	1,220
Payment of notes payable and capitalized leases, net			(154)
Deferred financing costs	(574)	(603)	(6,596)
Excess tax benefit from exercise of stock awards		171	196
Net cash provided by (used in) financing activities	49,553	(1,713)	(29,526)
Net (decrease) increase in cash and cash equivalents	(714)	889	(6,454)
Cash and cash equivalents at beginning of year	1,613	724	7,178
Cash and cash equivalents at end of year	$ 899	$ 1,613	$ 724