Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Net income	$ 13,493	$ 10,780
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,854	1,562
Stock-based compensation expense	1,962	2,290
Deferred taxes	2,623	4,030
Provision for bad debts	354	(64)
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable	2,777	(4,318)
Decrease (increase) in prepaid expenses and other assets	1,665	(898)
(Decrease) in accrued employee compensation	(13,608)	(11,819)
(Decrease) increase in deferred revenue	(97)	108
Increase (decrease) in accounts payable, accrued expenses and other liabilities	2,351	(605)
Net cash provided by operating activities	13,374	1,066
Securities available-for-sale:
Proceeds from sales	13,577
Proceeds from maturities	7,962	4,331
Purchases	(3,714)	(11,625)
Securities and cash provided as collateral	(28)	(28)
Purchases of furniture, equipment and leasehold improvements	(607)	(498)
Capitalization of software development costs	(1,298)	(842)
Net cash provided by (used in) investing activities	15,892	(8,662)
Cash flows from financing activities
Cash dividend on common stock	(4,201)	(3,388)
Exercise of stock options	354	4,608
Withholding tax payments on restricted stock vesting	5,818	4,417
Excess tax benefits from stock-based compensation	2,163	2,829
Repurchase of common stock	(71,116)
Other	(72)	(68)
Net cash (used in) financing activities	(78,718)	(436)
Effect of exchange rate changes on cash and cash equivalents	(359)	(395)
Cash and cash equivalents
Net (decrease) for the period	(49,811)	(8,427)
Beginning of period	169,620	124,994
End of period	119,809	116,567
Cash paid during the year
Cash paid for income taxes	988	300
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