Debt (Term Loans Under The Senior Credit Agreement) (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended		1 Months Ended	12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended			0 Months Ended			12 Months Ended	0 Months Ended			12 Months Ended			12 Months Ended		0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended								1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 07, 2014 2011 Term Loan [Member]	Apr. 18, 2013 2011 Term Loan [Member]	Apr. 24, 2013 2011 Term Loan [Member]	Dec. 31, 2013 2011 Term Loan [Member]	Jun. 30, 2011 2011 Term Loan [Member]	Dec. 31, 2013 2011 Term Loan B [Member]	Dec. 31, 2012 2011 Term Loan B [Member]	Dec. 31, 2013 2012-1 Term Loan A [Member]	May 09, 2012 2012-1 Term Loan A [Member]	Dec. 31, 2013 2012-1 Term Loan A [Member] First Eight Quarters [Member]	Dec. 31, 2013 2012-1 Term Loan A [Member] Next Four Quarters [Member]	Dec. 31, 2013 2012-1 Term Loan A [Member] Each Quarter Thereafter [Member]	Feb. 07, 2014 2012-2 Term Loan B [Member]	Apr. 24, 2013 2012-2 Term Loan B [Member]	Apr. 18, 2013 2012-2 Term Loan B [Member]	Dec. 31, 2013 2012-2 Term Loan B [Member]	Feb. 07, 2014 2014 Term Loan [Member]	Feb. 07, 2014 Revolving Credit Facility [Member]	Apr. 18, 2013 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	May 09, 2012 Revolving Credit Facility [Member]	Dec. 31, 2013 Base Rate [Member] 2011 Term Loan [Member]	Dec. 31, 2013 Base Rate [Member] 2012-2 Term Loan B [Member]	Feb. 07, 2014 Base Rate [Member] 2014 Term Loan [Member]	Dec. 31, 2013 Eurodollar [Member] 2011 Term Loan [Member]	Dec. 31, 2013 Eurodollar [Member] 2012-2 Term Loan B [Member]	Feb. 07, 2014 Eurodollar [Member] 2014 Term Loan [Member]	Dec. 31, 2013 Minimum [Member] Base Rate [Member]	Dec. 31, 2013 Minimum [Member] Base Rate [Member] 2012-1 Term Loan A [Member]	Dec. 31, 2013 Minimum [Member] Eurodollar [Member]	Dec. 31, 2013 Minimum [Member] Eurodollar [Member] 2012-1 Term Loan A [Member]	Dec. 31, 2013 Maximum [Member] Base Rate [Member]	Dec. 31, 2013 Maximum [Member] Base Rate [Member] 2012-1 Term Loan A [Member]	Dec. 31, 2013 Maximum [Member] Eurodollar [Member]	Dec. 31, 2013 Maximum [Member] Eurodollar [Member] 2012-1 Term Loan A [Member]	Mar. 31, 2014 Scenario, Forecast [Member] 2014 Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 5,910,041,000	$ 5,440,073,000					$ 500,000,000	$ 500,000,000	$ 180,529,000	$ 492,500,000	$ 200,000,000	$ 200,000,000							$ 300,000,000	$ 1,500,000			$ 215,000,000	$ 100,000,000
Debt instrument, maturity date							Jun. 30, 2018		Jun. 30, 2018		May 09, 2017								Sep. 28, 2019	Mar. 24, 2021			May 09, 2017
Basis spread on variable interest rate																										1.75%	1.75%	1.50%	2.75%	2.75%	2.50%	0.875%	1.00%	1.875%	2.00%	1.375%	1.50%	2.375%	2.50%
Base rate floor																										2.00%	2.00%	1.75%
Eurodollar rate floor																													1.00%	1.00%	0.75%
Accrued interest on Term Loan							3.75%				2.17%								3.75%
Percentage of par value price for issuance of term loan							99.75%												99.75%
Deferred financing fees							4,900,000				2,700,000	2,700,000							3,500,000	5,600,000					1,100,000
Quarterly payments													2,500,000	3,750,000	5,000,000
Repayments of long-term debt				180,500,000	310,700,000	310,700,000	312,000,000				10,000,000					110,000,000	189,300,000	189,300,000	190,000,000			100,000,000
Amortized deferred financing fees	15,560,000	12,870,000	9,188,000	1,100,000		2,300,000										1,000,000			2,000,000
Write off of discount related to debt				300,000		600,000										200,000			400,000
Aggregate debt	5,876,607,000	5,356,103,000					180,500,000		180,234,000	491,518,000	185,000,000								110,000,000				215,000,000	100,000,000
Remaining deferred financing fees, net							1,100,000												1,000,000
Repayments of revolving credit facility	225,000,000	484,000,000	270,000,000																		390,000,000		225,000,000
Proceeds from funding of term loan																				$ 750,000,000																				$ 750,000,000
Percentage fee charged for prepayment equal to aggregate principal amount																				1.00%