Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Current Assets	Sep. 30, 2011 Current Assets	Sep. 30, 2012 Noncurrent Assets	Sep. 30, 2011 Noncurrent Assets
Cash flows provided by operating activities:
Net income	$ 94,489	$ 110,999
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation of property and equipment	2,139	1,802
Amortization of trademarks and other intangibles	4,073	5,339
Amortization of deferred financing costs	1,467	3,987
Amortization of convertible notes discount	17,096	15,962
Stock-based compensation expense	7,490	7,321
Gain on re-measurement of equity investment		(21,465)
Provision for doubtful accounts	2,837	998
Equity earnings on joint ventures	(4,209)	(3,236)
Deferred income tax provision	22,992	21,952
Changes in operating assets and liabilities, net of business acquisitions:
Accounts receivable	(2,926)	(25,611)
Other assets-current	4,652	14,022
Other assets	8,742	15,247
Deferred revenue	(3,154)	(1,432)
Accounts payable and accrued expenses	1,774	(10,149)
Net cash provided by operating activities	157,462	135,736
Cash flows used in investing activities:
Purchases of property and equipment	(1,102)	(2,721)
Net distributions to equity partners	(6,477)	(23,995)
Additional investments in joint ventures	(6,857)
Earn-out payments on acquisitions	(3,771)
Sale of trademarks	4,490
Additions to trademarks	(546)	(263)
Net cash used in investing activities	(14,263)	(88,979)
Cash flows (used in) provided by financing activities:
Proceeds from long-term debt	150,000	292,500
Proceeds from sale of warrants		28,800
Purchase of convertible note hedges		(58,740)
Proceeds from exercise of stock options and warrants	759	2,352
Payment of long-term debt	(324,965)	(202,476)
Excess tax benefit from share-based payment arrangements	1,330	3,352
Cost of shares repurchased on open market	(88,335)
Deferred financing costs	(57)	(867)
Cost of shares repurchased on vesting of restricted stock and stock option exercises	(1,178)	(2,612)
Restricted cash			(501)	8,646	7,220	(10,165)
Net cash (used in) provided by financing activities	(259,727)	56,790
Net decrease in cash and cash equivalents	(116,528)	103,547
Cash and cash equivalents, beginning of period	167,717	118,635
Cash and cash equivalents, end of period	51,189	222,182
Balance of restricted cash - current	14,572	13,465
Total cash and cash equivalents including current restricted cash, end of period	65,761	235,647
Cash paid during the period:
Income taxes	11,747	33,564
Interest	13,903	13,898
Acquisitions:
Common stock issued	$ 2,221	$ 3,210