Debt (Narrative) (Details) (USD $)	12 Months Ended				12 Months Ended			24 Months Ended				12 Months Ended				12 Months Ended												12 Months Ended		12 Months Ended		24 Months Ended			12 Months Ended								12 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jun. 15, 2011	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 7.75% Senior Notes [Member]	Dec. 31, 2012 7.75% Senior Notes [Member]	Jun. 30, 2011 7.75% Senior Notes [Member]	Dec. 31, 2012 7.75% Senior Notes [Member] On Or After July 15, 2016 [Member]	Dec. 31, 2012 7.75% Senior Notes [Member] Effective After July 15, 2019 [Member]	Dec. 31, 2012 4.75% Senior Notes [Member]	Dec. 17, 2012 4.75% Senior Notes [Member]	Dec. 31, 2012 4.75% Senior Notes [Member] On Or After December 15, 2017 [Member]	Dec. 31, 2012 4.75% Senior Notes [Member] Effective After December 15, 2020 [Member]	Dec. 31, 2012 Proceeds of 4.75% Senior Notes Used to Repay Term Loan B Facility [Member]	Dec. 31, 2011 Credit Facility [Member]	Dec. 31, 2012 Credit Facility [Member]	Jun. 30, 2011 Credit Facility [Member]	Dec. 31, 2012 Credit Facility [Member] Base Rate Spreads [Member] Minimum [Member]	Dec. 31, 2012 Credit Facility [Member] Base Rate Spreads [Member] Maximum [Member]	Dec. 31, 2012 Credit Facility [Member] Eurodollar Rate [Member] Minimum [Member]	Dec. 31, 2012 Credit Facility [Member] Eurodollar Rate [Member] Maximum [Member]	Dec. 31, 2012 Credit Facility [Member] January 1, 2013 Ending December 31, 2014 [Member]	Dec. 31, 2012 Credit Facility [Member] After December 31, 2014 [Member]	Dec. 31, 2012 Credit Facility [Member] After December 31, 2013 [Member]	Dec. 31, 2012 Credit Facility [Member] Initial [Member]	Dec. 31, 2012 Revolving Facility [Member]	Jun. 30, 2011 Revolving Facility [Member]	Dec. 31, 2012 Term-A Facility [Member]	Dec. 31, 2011 Term-A Facility [Member]	Dec. 31, 2012 Term-A Facility [Member]	Jun. 30, 2011 Term-A Facility [Member]	Dec. 31, 2012 Term-A Facility [Member] Eurodollar Rate [Member]	Dec. 31, 2012 Term-A Facility [Member] Next Quarterly Installment As A Result Of Voluntary Prepayments Under Term Facility December 31 2014 [Member]	Dec. 31, 2012 Term-A Facility [Member] Quarterly Installments Under Term Facility from September 30, 2012 Through June 30, 2013 [Member]	Dec. 31, 2012 Term-A Facility [Member] Quarterly Installments Under Term Facility from September 30, 2013 Through June 30, 2014 [Member]	Dec. 31, 2012 Term-A Facility [Member] Quarterly Installments Under Term Facility from September 30, 2014 Through June 30, 2015 [Member]	Dec. 31, 2012 Term-A Facility [Member] Quarterly Installments Under Term Facility from September 30, 2015 Through March 31, 2017 [Member]	Dec. 31, 2012 Term-A Facility [Member] Quarterly Installment Under Term Facility Remainder Due June 30 2017 [Member]	Dec. 31, 2012 Term-B Facility [Member]	Jun. 30, 2011 Term-B Facility [Member]	Dec. 31, 2011 RNS term loan A [Member]	Dec. 31, 2010 RNS term loan A [Member]	Dec. 31, 2011 RNS 8 3/4% Senior Notes [Member]	May 13, 2011 RNS 8 3/4% Senior Notes [Member]	Dec. 31, 2011 RNS revlolving credit facility [Member]	May 13, 2011 RNS revlolving credit facility [Member]	Dec. 31, 2010 RNS revlolving credit facility [Member]	Dec. 31, 2011 RNS credit facility [Member]	Dec. 31, 2011 RNS 10 3/8% Senior Subordinated Notes [Member]	Jun. 30, 2011 RNS 10 3/8% Senior Subordinated Notes [Member]	Jun. 15, 2011 RNS 10 3/8% Senior Subordinated Notes [Member]	Dec. 31, 2011 RNS 10 3/8% Senior Subordinated Notes [Member] Other Transaction Costs [Member]	Dec. 31, 2011 RNS 10 3/8% Senior Subordinated Notes [Member] Tender Premiums, Along With Accretion To The Principal Amount [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount									$ 700,000,000				$ 600,000,000						$ 1,725,000,000										$ 500,000,000				$ 1,130,000,000									$ 595,000,000				$ 300,000,000		$ 300,000,000					$ 325,000,000
Interest Payable, Current	28,250,000	31,254,000																																												5,250,000						11,146,000
Debt Instrument, Unamortized Discount	26,685,000	30,745,000							14,000,000				10,500,000																				5,650,000									12,986,000
Line Of Credit Facility, Remaining Borrowing Capacity	500,000,000
Debt Instrument, Periodic Payment, Principal																																			4,250,000	14,125,000	28,250,000	42,375,000	56,500,000	395,500,000
Payments Of Debt Issuance Costs								1,533,000				1,393,000					26,309,000
Debt Instrument, Basis Spread On Variable Rate																				0.50%	1.25%	1.50%	2.25%
Debt Instrument, Interest Rate at Period End																																		1.96%
Debt Instrument, Interest Rate, Stated Percentage			8.625%						7.75%				4.75%
Line Of Credit Facility, Commitment Fee Percentage					0.25%	0.50%
Maximum Increase In Term Loan A Or Revolving Credit Facility																		400,000,000
Debt Instrument, Covenant, Senior Secured Cash Flow Ratio, Maximum																		4.75
Debt Instrument, Covenant, Cash Flow Ratio																								6	5.50		6.50
Debt Insturment, Covenant, Minimum Interest Coverage Ratio																										2.75	2.50
Write Off Of Deferred Debt Issuance Cost	1,862,000	6,247,000	0																											964,000	544,000										898,000				1,186,000		2,062,000				2,455,000
Debt Instrument, Maturity Date							Jul. 15, 2021					Dec. 15, 2022																Jun. 30, 2016		Jun. 30, 2017
Issuance of Debt to Related Party related to the Distribution																	577,000,000
Debt Insturment, Redemption Payment Term, Percentage Of Principal Amount										103.875%				102.375%																																100.00%
Debt Insturment, Redemption Payment Term Declining Annual Rate, Percentage Of Principal Amount											100.00%				100.00%
Debt Instrument, Decrease, Repayments																587,600,000														150,000,000		250,000,000											412,500,000				300,000,000			713,785,000
Loss On Extinguishment Of Debt	(10,774,000)	(14,726,000)	0																																						(10,774,000)				(350,000)									(1,321,000)	(12,864,000)
Unrealized Gain (Loss) On Derivatives																																									(8,725,000)
Purchase Price Of Note							101.00%	101.00%				101.00%
Borrowed Funds																																															300,000,000
Redemption Amount																																														100.00%						100.00%
Tender Offer Total Consideration Per Principal Amount																																																					1,039.58
Tender Offer Consideration Per Principal Amount, Early Tender Premium				10
Tender Offer Consideration Per Principal Amount																																																					1,029.58
Line Of Credit Facility, Amount Outstanding																																												$ 425,000,000					$ 50,000,000