Transition Period Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended										12 Months Ended			3 Months Ended			12 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2010	Sep. 30, 2010 Predecessor [Member]	Dec. 31, 2009 Predecessor [Member]	Sep. 30, 2009 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]	Dec. 31, 2010 Successor [Member]	Dec. 31, 2012 Successor [Member]	Dec. 31, 2011 Successor [Member]	Oct. 02, 2010 Successor [Member]
Transition Period Financial Information [Line Items]
Revenues	$ 528,104	$ 514,517	$ 486,511	$ 431,403	$ 394,255	$ 390,681	$ 329,885	$ 295,167	$ 281,171	$ 372,624	$ 1,960,535	$ 1,409,988	$ 1,522,817	$ 372,624	$ 386,755	$ 413,284		$ 281,171
Costs and Expenses									151,905	281,988	1,216,319	788,170	1,169,378	281,988	314,540	367,034		151,905
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	145,594	200,649	216,731	181,242	170,115	177,446	144,021	130,236	129,266	90,636	744,216	621,818	353,439	90,636	72,215	46,250		129,266
Income Tax Expense (Benefit)									54,633	39,336	281,090	236,291	132,893	39,336	26,186	20,489	132,893	54,633	281,090	236,291
Net Income (Loss) Attributable to Parent	90,604	123,948	136,295	112,279	103,664	108,807	95,818	77,238	74,633	51,300	463,126	385,527	220,546	51,300	46,029	25,761	220,546	74,633
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax									(412)	6,255	(2,449)	2,852	43,306	6,255	17,087	7,411		(412)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax									1,819	2,055	5,913	(10,981)	8,230	2,055	1,344	6,924		1,819
Other Comprehensive Income (Loss), Tax									151	(3,027)	899	(1,046)	(18,567)	(3,027)	(6,701)	(5,176)		151
Other Comprehensive Income (Loss), Net of Tax									1,558	5,283	4,363	(9,175)	32,969	5,283	11,730	9,159		1,558
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									76,191	56,583	467,489	376,352	253,515	56,583	57,759	34,920		76,191
Earnings Per Share, Basic										$ 0.38			$ 1.65	$ 380.00	$ 340.00	$ 190.00	$ 1,650.00
Earnings Per Share, Diluted										$ 0.37			$ 1.60	$ 370.00	$ 330.00	$ 190.00	$ 1,600.00
Weighted Average Number of Shares Outstanding, Basic										135,232,827			133,845,238	135,232,827	133,492,069	133,229,960	133,845,238
Weighted Average Number of Shares Outstanding, Diluted										140,302,755			138,179,945	140,302,755	137,630,694	136,083,460	138,179,945
Assets	16,197,071				13,042,920						16,197,071	13,042,920		10,107,410	10,289,504	11,215,732		10,918,738			11,370,234
Liabilities	11,817,844				9,119,882						11,817,844	9,119,882		7,656,789	8,071,112	9,065,459		7,388,630			7,916,317
Stockholders' Equity Attributable to Parent	$ 4,379,227				$ 3,923,038						$ 4,379,227	$ 3,923,038		$ 2,450,621	$ 2,218,392	$ 2,150,273		$ 3,530,108