Consolidated Statements of Equity (Unaudited) (USD $)	Total	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest	Series A Preferred Stock	Common stock Class A	Common Stock Class B
Balance at Jan. 31, 2013	$ 1,738,571,000	$ 932,045,000	$ 576,285,000	$ (108,000)	$ (103,203,000)	$ 261,679,000	$ 10,552,000	$ 54,576,000	$ 6,745,000
Balance, Shares at Jan. 31, 2013				7,000			211,000	163,729,000	20,235,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss, net of $13,299 and $16,847 attributable to redeemable noncontrolling interest	(53,943,000)		(5,307,000)			(48,636,000)
Other comprehensive income, net of tax	26,655,000				26,621,000	34,000
Purchase of treasury stock	(3,167,000)			(3,167,000)
Purchase of treasury stock, Shares				180,000
Conversion of Class B to Class A shares	0							20,000	(20,000)
Conversion of Class B to Class A shares, Shares								62,000	(62,000)
Issuance of Class A shares in exchange for Series A preferred stock	0	5,368,000					(5,489,000)	121,000
Issuance of Class A shares in exchange for Series A preferred stock, Shares							(110,000)	363,000
Redemption of Series A preferred stock	(5,063,000)						(5,063,000)
Redemption of Series A preferred stock, Shares							(101,000)
Proceeds from settlement of equity call hedge related to issuance of preferred stock	10,231,000	23,099,000		(12,868,000)
Proceeds from settlement of equity call hedge related to issuance of preferred stock, Shares				765,000
Issuance of Class A shares in exchange for Puttable Equity-Linked Senior Notes due 2014	194,345,000	189,786,000						4,559,000
Issuance of Class A shares in exchange for Puttable Equity-Linked Senior Notes due 2014, Shares								13,679,000
Restricted stock vested	0	(202,000)						202,000
Restricted stock vested, Shares								600,000
Exercise of stock options	1,153,000	966,000		165,000				22,000
Exercise of stock options, Shares				(10,000)				66,000
Preferred stock dividends	(185,000)		(185,000)
Stock-based compensation	16,197,000	16,197,000
Excess income tax deficiency from stock-based compensation	(133,000)	(133,000)
Redeemble noncontrolling interest adjustment	50,546,000	50,546,000
Acquisition of partners' noncontrolling interest in consolidated subsidiaries	(98,687,000)	(95,924,000)				(2,763,000)
Contributions from noncontrolling interests	80,339,000					80,339,000
Distributions to noncontrolling interests	(36,400,000)					(36,400,000)
Change to equity method of accounting for subsidiaries	5,660,000					5,660,000
Adjustment due to change in ownership of consolidated subsidiaries	0	(26,000,000)				26,000,000
Balance at Dec. 31, 2013	1,926,119,000	1,095,748,000	570,793,000	(15,978,000)	(76,582,000)	285,913,000	0	59,500,000	6,725,000
Balance, Shares at Dec. 31, 2013				942,000			0	178,499,000	20,173,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss, net of $13,299 and $16,847 attributable to redeemable noncontrolling interest	(74,215,000)		(76,786,000)			2,571,000
Other comprehensive income, net of tax	15,320,000				15,274,000	46,000
Purchase of treasury stock	(3,800,000)			(3,800,000)
Purchase of treasury stock, Shares	205,568			205,000
Conversion of Class B to Class A shares	0							318,000	(318,000)
Conversion of Class B to Class A shares, Shares								953,000	(953,000)
Restricted stock vested	0	(223,000)						223,000
Restricted stock vested, Shares								669,000
Exercise of stock options	583,000	(245,000)		828,000
Exercise of stock options, Shares				(48,000)
Stock-based compensation	14,840,000	14,840,000
Excess income tax deficiency from stock-based compensation	(149,000)	(149,000)
Exchange of Class A Common Units for Class A Shares	0	34,134,000				(34,358,000)		224,000
Exchange of Class A Common Units for Class A Shares, Shares								673,000
Redeemble noncontrolling interest adjustment	(28,390,000)	(28,390,000)
Acquisition of partners' noncontrolling interest in consolidated subsidiaries	(94,557,000)	(28,151,000)				(66,406,000)
Contributions from noncontrolling interests	34,249,000					34,249,000
Distributions to noncontrolling interests	(8,992,000)					(8,992,000)
Adjustment due to change in ownership of consolidated subsidiaries	(3,494,000)	8,250,000				(11,744,000)
Balance at Sep. 30, 2014	$ 1,777,514,000	$ 1,095,814,000	$ 494,007,000	$ (18,950,000)	$ (61,308,000)	$ 201,279,000	$ 0	$ 60,265,000	$ 6,407,000
Balance, Shares at Sep. 30, 2014				1,099,000			0	180,794,000	19,220,000