Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities
Net income	$ 17,475	$ 15,326
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,121	2,569
Stock-based compensation expense	2,316	1,997
Deferred taxes	2,159	2,764
Other	558	(267)
Changes in operating assets and liabilities:
(Increase) in accounts receivable	(4,919)	(1,136)
Decrease in prepaid expenses and other assets	1,313	76
(Decrease) in accrued employee compensation	(17,628)	(14,969)
Increase (decrease) in deferred revenue	9	(1,041)
Increase in accounts payable, accrued expenses and other liabilities	4,743	4,960
Net cash provided by operating activities	10,147	10,279
Cash flows from investing activities
Acquisition of business, net of cash acquired		(37,118)
Securities available-for-sale:
Proceeds from sales		30,900
Proceeds from maturities	3,750	2,770
Purchases of furniture, equipment and leasehold improvements	(1,622)	(794)
Capitalization of software development costs	(2,571)	(1,366)
Other	(6)	64
Net cash (used in ) investing activities	(449)	(5,544)
Cash flows from financing activities
Cash dividend on common stock	(6,232)	(5,405)
Exercise of stock options	419	630
Withholding tax payments on restricted stock vesting and stock option exercises	(4,927)	(5,001)
Excess tax benefits from stock-based compensation	2,252	1,927
Repurchases of common stock	(3,386)
Other	(42)	(78)
Net cash (used in) financing activities	(11,916)	(7,927)
Effect of exchange rate changes on cash and cash equivalents	(428)	203
Cash and cash equivalents
Net (decrease) for the period	(2,646)	(2,989)
Beginning of period	132,691	128,908
End of period	130,045	125,919
Cash paid during the year
Cash paid for income taxes	878	829
Liabilities assumed in connection with the Xtrakter acquisition:
Fair value of assets acquired		44,486
Cash paid for the capital stock		(37,118)
Liabilities assumed		$ 7,368