Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 5,453	$ 4,470
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	935	950
Deferred income taxes	96	13
Non-cash share-based compensation (benefit) expense	(112)	218
Tax benefit from exercise of stock options	72	56
Loss on disposal of property and equipment		1
Net changes in assets and liabilities:
Trade accounts receivable	(1,075)	(2,297)
Unbilled revenue	(3)	(633)
Prepaid expenses and other	(481)	(633)
Accounts payable	43	799
Accrued expenses, wages, bonuses and profit sharing	(632)	(1,237)
Income taxes receivable and payable	31	1,502
Deferred revenue	836	(108)
Net cash provided by operating activities	5,163	3,101
Cash flows from investing activities:
Purchases of property and equipment	(605)	(416)
Net cash used in investing activities	(605)	(416)
Cash flows from financing activities:
Payments on notes payable	(558)	(326)
Payments on capital lease obligations	(29)	(27)
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	528	575
Payment of dividends on common stock		(2,142)
Net cash provided by (used in) financing activities	40	(1,600)
Effect of exchange rate changes on cash	(237)	(137)
Increase in cash and cash equivalents	4,361	948
Cash and cash equivalents at beginning of period	22,092	8,286
Cash and cash equivalents at end of period	26,453	9,234
Supplemental disclosure of cash paid for:
Interest expense	76	77
Income taxes	$ 2,219	$ 257