Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 6,521	$ 5,506
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,106	968
Deferred income taxes	415	775
Reserve for uncertain tax positions	32	(119)
Non-cash share-based compensation expense	450	536
Net changes in assets and liabilities:
Trade accounts receivable	(2,647)	(4,167)
Unbilled revenue	(374)	33
Prepaid expenses	(540)	(254)
Accounts payable	207	469
Accrued expenses, wages, bonuses and profit sharing	(1,606)	58
Income taxes receivable and payable	2,890	(2,451)
Deferred revenue	1,689	3,013
Net cash provided by operating activities	8,143	4,367
Cash flows from investing activities:
Purchases of property and equipment	(1,425)	(1,084)
Net cash used in investing activities	(1,425)	(1,084)
Cash flows from financing activities:
Payments on notes payable	(816)	(594)
Payments on capital lease obligations	(27)	(25)
Cash paid for non-controlling interest		(2,000)
Proceeds from exercise of stock options		547
Payment of payroll tax withholdings on net exercise of share-based compensation	(105)	(147)
Payment of dividends on common stock	(4,213)	(18,440)
Net cash used in financing activities	(5,161)	(20,659)
Effect of exchange rate changes on cash	86	597
Change in cash and cash equivalents	1,643	(16,779)
Cash and cash equivalents at beginning of period	33,021	42,145
Cash and cash equivalents at end of period	34,664	25,366
Supplemental disclosure of cash paid for:
Interest, net of capitalized amounts	24	83
Income taxes	122	4,361
Supplemental disclosure of non-cash investing and financing activities:
Capital lease obligations originated for property and equipment	64
Stock tendered to the Company for cashless exercise of stock options in connection with equity incentive plans	$ 1,612