Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 4,470	$ 3,849
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	950	1,243
Deferred income taxes	13	275
Non-cash share-based compensation expense	218	52
Tax benefit from exercise of stock options	56	213
Loss on disposal of property and equipment	1
Net changes in assets and liabilities:
Trade accounts receivable	(2,297)	(2,340)
Unbilled revenue	(633)	(75)
Prepaid expenses and other	(633)	(933)
Accounts payable	799	87
Accrued expenses, wages, bonuses and profit sharing	(1,237)	(335)
Income taxes receivable and payable	1,502	11
Deferred revenue	(108)	34
Net cash provided by operating activities	3,101	2,081
Cash flows from investing activities:
Purchases of property and equipment	(416)	(633)
Net cash used in investing activities	(416)	(633)
Cash flows from financing activities:
Payments on notes payable	(326)	(467)
Payments on capital lease obligations	(27)	(31)
Proceeds from exercise of stock options	375	372
Common stock withheld from vested restricted shares for payroll tax withholdings	(55)	(466)
Excess tax benefit from share-based compensation	575	599
Payment of dividends on common stock	(2,142)	(1,762)
Net cash used in financing activities	(1,600)	(1,755)
Effect of exchange rate changes on cash	(137)	97
Increase (decrease) in cash and cash equivalents	948	(210)
Cash and cash equivalents at beginning of period	8,286	8,082
Cash and cash equivalents at end of period	9,234	7,872
Supplemental disclosure of cash paid for:
Interest expense	77	135
Income taxes	$ 257	$ 708