Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 7,904	$ 7,789
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,882	2,457
Deferred income taxes	52	(353)
Non-cash share-based compensation expense	457	82
Tax benefit from exercise of stock options	56	273
Loss on disposal of property and equipment	1	2
Net changes in assets and liabilities:
Trade accounts receivable	(2,548)	(1,875)
Unbilled revenue	(856)	(594)
Prepaid expenses and other	(519)	(670)
Accounts payable	800	(5)
Accrued expenses, wages, bonuses and profit sharing	(1,297)	(73)
Income taxes receivable and payable	(94)	(316)
Deferred revenue	131	1,084
Net cash provided by operating activities	5,969	7,801
Cash flows from investing activities:
Purchases of property and equipment	(966)	(1,284)
Net cash used in investing activities	(966)	(1,284)
Cash flows from financing activities:
Payments on notes payable	(830)	(936)
Payments on capital lease obligations	(54)	(62)
Proceeds from exercise of stock options	375	757
Common stock withheld from vested restricted shares for payroll tax withholdings	(55)	(527)
Excess tax benefit from share-based compensation	575	899
Payment of dividends on common stock	(2,142)	(3,525)
Net cash used in financing activities	(2,131)	(3,394)
Effect of exchange rate changes on cash	(356)	(37)
Increase in cash and cash equivalents	2,516	3,086
Cash and cash equivalents at beginning of period	8,286	8,082
Cash and cash equivalents at end of period	10,802	11,168
Supplemental disclosure of cash paid for:
Interest expense	172	272
Income taxes	$ 3,917	$ 2,517