Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 9,505	$ 7,904
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,861	1,882
Deferred income taxes	11	52
Non-cash share-based compensation expense	130	457
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	(400)	(2,548)
Unbilled revenue	(438)	(856)
Prepaid expenses and other	(362)	(519)
Accounts payable	301	800
Accrued expenses, wages, bonuses and profit sharing	(1,162)	(1,297)
Income taxes receivable and payable	(239)	(94)
Deferred revenue	2,093	131
Net cash provided by operating activities	11,374	5,969
Cash flows from investing activities:
Purchases of property and equipment	(1,425)	(966)
Net cash used in investing activities	(1,425)	(966)
Cash flows from financing activities:
Payments on notes payable	(1,120)	(830)
Payments on capital lease obligations	(59)	(54)
Proceeds from exercise of stock options	408	375
Common stock withheld from vested restricted shares for payroll tax withholdings	(309)	(55)
Excess tax benefit from share-based compensation	531	575
Payment of dividends on common stock		(2,142)
Net cash used in financing activities	(549)	(2,131)
Effect of exchange rate changes on cash	47	(356)
Increase in cash and cash equivalents	9,447	2,516
Cash and cash equivalents at beginning of period	22,092	8,286
Cash and cash equivalents at end of period	31,539	10,802
Supplemental disclosure of cash paid for:
Interest, net of capitalized amounts	149	172
Income taxes	4,842	3,917
Supplemental disclosure of non-cash investing and financing activities:
Assets purchased under capital lease	$ 248	$ 2