Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 5,358	$ 7,357
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,874	2,302
Amortization of deferred financing costs and accretion of interest	55	85
Share based compensation	3,778	2,771
Excess tax benefit on stock options	(159)	(1,225)
Provision for doubtful accounts	30	20
Deferred income taxes	1,673	1,631
Unrealized currency loss (gain) on foreign denominated intercompany transactions	1,130	(9)
Changes in operating assets and liabilities:
Accounts receivable	(1,134)	(1,073)
Prepaid expenses and other assets	(32)	1,443
Restricted cash	(18)
Accounts payable	872	566
Accrued income taxes	(1,085)	(1,193)
Accrued expenses and other liabilities	(1,995)	(3,080)
Deferred revenue	(158)	1,327
Net cash provided by operating activities	11,189	10,922
Cash flows from investing activities
Purchases of property and equipment	(527)	(4,173)
Acquisition of business, net of cash acquired	(101)	(14,303)
Net cash used in investing activities	(628)	(18,476)
Cash flows from financing activities
Excess tax benefit on stock options	159	1,225
Common stock dividends paid	(4,002)	(3,151)
Purchase of treasury stock		(6,072)
Proceeds from exercises of common stock options	790	4,594
Net cash used in financing activities	(3,053)	(3,404)
Effect of exchange rates on cash and cash equivalents	413	(602)
Increase (decrease) in cash and cash equivalents	7,921	(11,560)
Cash and cash equivalents at beginning of period	87,520	90,325
Cash and cash equivalents at end of period	$ 95,441	$ 78,765