Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net income	$ 37,736	$ 36,675
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,738	8,434
Stock-based compensation expense	13,752	12,342
Excess tax benefits from stock-based compensation	(11,146)	(13,219)
Deferred taxes	7,351	(1,872)
Amortization and write-off of debt issue costs	581	858
Changes in assets and liabilities, net of acquisition:
Fees receivable, net	(4,210)	17,851
Deferred commissions	8,578	4,113
Prepaid expenses and other current assets	(4,366)	(4,467)
Other assets	(1,311)	(6,467)
Deferred revenues	65,280	51,019
Accounts payable, accrued, and other liabilities	(104,513)	(85,574)
Cash provided by operating activities	16,470	19,693
Investing activities:
Additions to property, equipment and leasehold improvements	(9,185)	(9,648)
Acquisition - cash paid (net of cash acquired)	(101,770)	0
Acquisition - increase in restricted cash (escrow)	(13,500)	0
Cash used in investing activities	(124,455)	(9,648)
Financing activities:
Proceeds from stock issued under stock plans	2,428	1,955
Proceeds from debt issuance	151,875	200,000
Payments for debt issuance costs	0	(3,553)
Payments on debt	(1,875)	(200,000)
Purchases of treasury stock	(195,850)	(48,527)
Excess tax benefits from stock-based compensation	11,146	13,219
Cash used in financing activities	(32,276)	(36,906)
Net increase in cash and cash equivalents	(140,261)	(26,861)
Effects of exchange rates on cash and cash equivalents	(445)	(3,928)
Cash and cash equivalents, beginning of period	423,990	299,852
Cash and cash equivalents, end of period	$ 283,284	$ 269,063