Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities:
Net income	$ 61,414	$ 39,516
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangibles	17,554	18,487
Stock-based compensation expense	16,993	16,034
Excess tax benefits from stock-based compensation	(21,940)	(7,821)
Deferred taxes	(1,395)	(707)
Amortization of debt issue costs	1,182	531
Changes in assets and liabilities:
Fees receivable, net	11,915	21,359
Deferred commissions	7,561	13,497
Prepaid expenses and other current assets	(2,098)	5,150
Other assets	(792)	(33,572)
Deferred revenues	35,478	26,631
Accounts payable, accrued, and other liabilities	(61,959)	(37,513)
Cash provided by operating activities	63,913	61,592
Investing activities:
Additions to property, equipment and leasehold improvements	(9,460)	(7,693)
Acquisitions (net of cash received)		(12,151)
Cash used in investing activities	(9,460)	(19,844)
Financing activities:
Proceeds from stock issued under stock plans	16,347	10,997
Proceeds from debt issuance	10,000	63,000
Payments on debt	(10,156)	(35,000)
Purchases of treasury stock	(87,859)	(75,104)
Excess tax benefits from stock-based compensation	21,940	7,821
Cash used by financing activities	(49,728)	(28,286)
Net increase in cash and cash equivalents	4,725	13,462
Effects of exchange rates on cash and cash equivalents	435	(7,672)
Cash and cash equivalents, beginning of period	120,181	116,574
Cash and cash equivalents, end of period	$ 125,341	$ 122,364