Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
OPERATING ACTIVITIES
Net income	$ 2,986	$ 1,793
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	463	325
Amortization	1,565	1,143
Deferred income taxes	699	534
Non-cash stock compensation and retirement savings plan contributions	2,206	2,057
Tax benefit from stock option exercises and restricted stock vesting	(242)	(1,303)
Adjustment to fair value of contingent consideration for purchase of business	171	60
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(1,776)	(339)
Other assets	642	(675)
Accounts payable	(869)	(3,122)
Other liabilities	(3,982)	(7,344)
Net cash provided by (used in) operating activities	1,863	(6,871)
INVESTING ACTIVITIES
Proceeds from the maturity of investments	0	2,187
Purchase of property and equipment	(355)	(630)
Capitalization of software developed for internal use	(42)	(25)
Purchase of business and related costs	(14,426)	(289)
Net cash provided by (used in) investing activities	(14,823)	1,243
FINANCING ACTIVITIES
Proceeds from line of credit	26,000	0
Payments on line of credit	(19,800)	0
Tax benefit on stock option exercises and restricted stock vesting	242	1,303
Proceeds from the exercise of stock options and sales of stock through the Employee Stock Purchase Plan	30	3,406
Purchase of treasury stock	(386)	(2,369)
Remittance of taxes withheld as part of a net share settlement of restricted stock vesting	(212)
Net cash provided by financing activities	5,874	2,340
Effect of exchange rate on cash and cash equivalents	8	(9)
Change in cash and cash equivalents	(7,078)	(3,297)
Cash and cash equivalents at beginning of period	9,732	12,707
Cash and cash equivalents at end of period	2,654	9,410
Supplemental disclosures:
Cash paid for income taxes	793	1,438
Non-cash activity:
Stock issued for purchase of business	6,143
Estimated initial fair value of contingent consideration for purchase of business	$ 0	$ 3,399