Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 11,717	$ 11,365
Depreciation and amortization	2,788	3,606
Deferred income taxes	161	(413)
Non-cash share-based compensation expense	706	179
Tax benefit from exercise of stock options	56	373
Loss on disposal of property and equipment	1	2
Trade accounts receivable	710	(2,884)
Unbilled revenue	(1,230)	33
Prepaid expenses and other	(446)	(693)
Accounts payable	512	(297)
Accrued expenses, wages, bonuses and profit sharing	(241)	1,427
Income taxes receivable and payable	(173)	(235)
Deferred revenue	777	1,131
Net cash provided by operating activities	15,338	13,594
Purchases of property and equipment	(1,561)	(1,890)
Net cash used in investing activities	(1,561)	(1,890)
Payments on notes payable	(1,560)	(1,410)
Payments on capital lease obligations	(81)	(89)
Proceeds from exercise of stock options	375	1,058
Common stock withheld from vested restricted shares for payroll tax withholdings	(55)	(527)
Excess tax benefit from share-based compensation	575	1,353
Payment of dividends on common stock	(2,142)	(5,299)
Net cash used in financing activities	(2,888)	(4,914)
Effect of exchange rate changes on cash	(241)	154
Increase in cash and cash equivalents	10,648	6,944
Cash and cash equivalents at beginning of period	8,286	8,082
Cash and cash equivalents at end of period	18,934	15,026
Interest expense	286	394
Income taxes	$ 6,071	$ 3,897