Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net income	$ 14,057	$ 11,717
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,810	2,788
Deferred income taxes	(81)	161
Reserve for uncertain tax positions	25
Non-cash share-based compensation expense	398	706
Tax benefit from exercise of stock options	73	56
Loss on disposal of property and equipment	1	1
Net changes in assets and liabilities:
Trade accounts receivable	41	710
Unbilled revenue	144	(1,230)
Prepaid expenses and other	(176)	(446)
Accounts payable	(47)	512
Accrued expenses, wages, bonuses and profit sharing	124	(241)
Income taxes receivable and payable	227	(173)
Deferred revenue	3,020	777
Net cash provided by operating activities	20,616	15,338
Cash flows from investing activities:
Purchases of property and equipment	(2,100)	(1,561)
Net cash used in investing activities	(2,100)	(1,561)
Cash flows from financing activities:
Payments on notes payable	(1,686)	(1,560)
Payments on capital lease obligations	(117)	(81)
Proceeds from exercise of stock options	408	375
Common stock withheld from vested restricted shares for payroll tax withholdings	(308)	(55)
Excess tax benefit from share-based compensation	531	575
Payment of dividends on common stock		(2,142)
Net cash used in financing activities	(1,172)	(2,888)
Effect of exchange rate changes on cash	(373)	(241)
Increase in cash and cash equivalents	16,971	10,648
Cash and cash equivalents at beginning of period	22,092	8,286
Cash and cash equivalents at end of period	39,063	18,934
Supplemental disclosure of cash paid for:
Interest, net of capitalized amounts	218	286
Income taxes	7,054	6,071
Supplemental disclosure of non-cash investing and financing activities:
Assets purchased under capital lease	$ 248