Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities
Net income	$ 35,666	$ 34,669
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,472	5,746
Stock-based compensation expense	4,651	4,178
Deferred taxes	2,546	2,262
Other	852	(944)
Changes in operating assets and liabilities:
(Increase) in accounts receivable	(6,764)	(7,427)
(Increase) in prepaid expenses and other assets	(1,683)	(2,206)
(Decrease) in accrued employee compensation	(11,615)	(8,066)
Increase (decrease) in deferred revenue	237	(1,002)
Increase in accounts payable, accrued expenses and other liabilities	4,050	3,039
Net cash provided by operating activities	36,412	30,249
Cash flows from investing activities
Acquisition of business, net of cash acquired		(37,827)
Securities available-for-sale:
Proceeds from sales		30,900
Proceeds from maturities	5,410	5,185
Purchases	(4,181)
Purchases of furniture, equipment and leasehold improvements	(3,754)	(7,416)
Capitalization of software development costs	(4,971)	(3,284)
Other	(33)	63
Net cash (used in ) investing activities	(7,529)	(12,379)
Cash flows from financing activities
Cash dividend on common stock	(12,164)	(10,258)
Exercise of stock options	845	1,380
Withholding tax payments on restricted stock vesting and stock option exercises	(4,968)	(5,001)
Excess tax benefits from stock-based compensation	2,576	2,651
Repurchases of common stock	(13,748)
Other	(42)	(158)
Net cash (used in) financing activities	(27,501)	(11,386)
Effect of exchange rate changes on cash and cash equivalents	(919)	76
Cash and cash equivalents
Net increase for the period	463	6,560
Beginning of period	132,691	128,908
End of period	133,154	135,468
Cash paid during the year
Cash paid for income taxes	15,230	12,612
Liabilities assumed in connection with the Xtrakter acquisition:
Fair value of assets acquired		44,745
Acquisition of business, net of cash acquired		(37,827)
Liabilities assumed		$ 6,918