Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities
Net income	$ 39,604	$ 36,161
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,896	4,988
Stock-based compensation expense	6,184	4,997
Deferred taxes	1,958	14,496
Provision for bad debts	409	56
Other	757
Changes in operating assets and liabilities
Decrease (increase) in accounts receivable	2,347	(6,232)
(Increase) in prepaid expenses and other assets	(82)	(6,519)
(Decrease) in accrued employee compensation	(3,990)	(2,119)
(Decrease) in deferred revenue	(262)	466
Increase in accounts payable, accrued expenses and other liabilities	449	497
Net cash provided by operating activities	53,270	46,791
Securities available-for-sale:
Proceeds from sales	13,577
Proceeds from maturities	15,463	20,845
Purchases	(6,376)	(27,719)
Securities and cash (provided) received as collateral	(37)	3,498
Purchases of furniture, equipment and leasehold improvements	(4,955)	(2,517)
Capitalization of software development costs	(3,873)	(2,898)
Net cash provided by (used in) investing activities	13,799	(8,791)
Cash flows from financing activities
Cash dividend on common stock	(12,388)	(10,236)
Exercise of stock options	5,997	4,863
Withholding tax payments on restricted stock vesting and stock option exercises	(20,003)	(4,415)
Excess tax benefits from stock-based compensation	13,639	5,473
Repurchase of common stock	(72,603)
Other	(222)	(206)
Net cash (used in) financing activities	(85,580)	(4,521)
Effect of exchange rate changes on cash and cash equivalents	(1,008)	(851)
Cash and cash equivalents
Net (decrease) increase for the period	(19,519)	32,628
Beginning of year	169,620	124,994
End of period	150,101	157,622
Cash paid during the period:
Cash paid for income taxes	10,602	9,574
Non-cash activity:
Conversion of Series B Preferred Stock to common stock		30,315
Conversion of common stock non-voting to common stock voting	$ 15,880