Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating activities
Net income	$ 18,278	$ 17,108	$ 14,215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,671	6,018	5,460
Loss on sale of assets	31	115	332
Amortization of debt issuance costs	638	638	640
Non-cash stock-based compensation	2,451	2,310	2,292
Provision for losses on accounts receivable	201	100	376
Excess tax benefit related to stock option exercises	(246)	(1,446)	(535)
Deferred income taxes	2,913	2,629	4,642
Changes in operating assets and liabilities:
Notes and accounts receivable	4,095	(9,672)	(1,860)
Prepaid assets	(154)	2,710	(2,244)
Other assets	(1,332)	(1,887)	(1,798)
Accounts payable	763	(5,098)	2,028
Accrued liabilities	641	6,009	(1,787)
Net cash provided by operating activities	34,950	19,534	21,761
Investing activities
Purchase of leasehold improvements and equipment	(4,150)	(2,985)	(3,486)
Proceeds from the sale of assets	116	5	58
Acquisitions	14	(3,597)	(2,450)
Cost of contracts purchased	(932)	(678)	(934)
Capital interest	(43)	(139)
Contingent payments for businesses acquired	(262)	(340)	(268)
Net cash used in investing activities	(5,257)	(7,734)	(7,080)
Financing activities
Proceeds from exercise of stock options	217	1,773	415
Repurchase of common stock	(7,544)		(3,885)
Earn-out payments		(529)
Payments on senior credit facility	(15,200)	(14,650)	(10,750)
Payments on long-term borrowings	(136)	(128)	(120)
Distribution to noncontrolling interest	(388)	(271)	(136)
Payments of debt issuance costs	(30)	(30)	(30)
Payments on capital leases	(553)	(531)	(983)
Tax benefit related to stock option exercise	246	1,446	535
Net cash used in financing activities	(23,388)	(12,920)	(14,954)
Effect of exchange rate changes on cash and cash equivalents	(390)	169	228
Increase (decrease) in cash and cash equivalents	5,915	(951)	(45)
Cash and cash equivalents at beginning of year	7,305	8,256	8,301
Cash and cash equivalents at end of year	13,220	7,305	8,256
Cash paid for:
Interest	4,015	5,097	5,951
Income taxes	$ 7,507	$ 7,270	$ 2,938