CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY ( UNAUDITED ) (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Deficit) [Member]	Accumulated Other Comprehensive Income (loss) [Member]	Noncontrolling Interest [Member]	Redeemable Noncontrolling Interest (Temporary Equity) [Member]
Balance at Dec. 31, 2012	$ 2,128,051	$ 1,489	$ 1,405,699	$ 452,598	$ (38,862)	$ 307,127	$ 136,500
Other comprehensive income (loss), net of tax:
Comprehensive income (loss)	522,156			396,551	863	124,742	10,575
Dividends paid to noncontrolling interest	(140,277)					(140,277)	(6,370)
Dividends: declared and paid	(66,367)			(66,367)
Repurchase of Class A Common shares	(253,203)	(39)	(38,537)	(214,627)
Stock-based compensation expense	31,505		31,505
Exercise of employee stock options	36,500	8	36,492
Other stock-based compensation, net	(4,716)	3	(4,719)
Tax benefits of compensation plans	4,351		4,351
Balance at Sep. 30, 2013	2,258,000	1,461	1,434,791	568,155	(37,999)	291,592	140,705
Balance at Dec. 31, 2013	2,418,892	1,462	1,447,496	662,574	(12,529)	319,889	133,000
Other comprehensive income (loss), net of tax:
Comprehensive income (loss)	528,670			413,429	(11,539)	126,780	8,388
Dividends paid to noncontrolling interest	(172,928)					(172,928)	(21,928)
Dividends: declared and paid	(85,364)			(85,364)
Repurchase of Class A Common shares	(800,062)	(103)	(109,103)	(690,856)
Stock-based compensation expense	29,658		29,658
Exercise of employee stock options	35,118	9	35,109
Other stock-based compensation, net	(9,768)	3	(9,771)
Tax benefits of compensation plans	11,442		11,442
Balance at Sep. 30, 2014	$ 1,955,658	$ 1,371	$ 1,404,831	$ 299,783	$ (24,068)	$ 273,741	$ 119,460