Debt Senior Credit Facility (Details) (USD $)			3 Months Ended				3 Months Ended				3 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Term Loan A	Mar. 31, 2014 Term Loan A2	Mar. 31, 2014 Term Loan B [Member]	Apr. 03, 2013 Term Loan B [Member]	Mar. 31, 2014 Revolver [Member]	Apr. 03, 2013 Revolver [Member]	Mar. 31, 2014 Letter of Credit	Mar. 31, 2014 Additional Revolver	Mar. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Term Loan B [Member]	Apr. 03, 2013 London Interbank Offered Rate (LIBOR) [Member] Term Loan B [Member]	Mar. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Revolver [Member]	Mar. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Maximum [Member]
Line of Credit Facility [Line Items]
Face amount						$ 300,000,000
Basis spread on variable rate			2.75%	2.75%	2.75%		2.75%				2.50%		2.50%	2.75%
Floor interest rate												0.75%
Current borrowing capacity								700,000,000
Borrowing capacity increase	350,000,000									304,000,000
Term loan	297,750,000	298,500,000			297,750,000
Long-term Debt									61,000,000
Revolver	$ 335,000,000	$ 340,000,000					$ 335,000,000
Long-term Debt, Weighted Average Interest Rate	2.90%
Total Leverage Ratio	5.75
Senior Secured Leverage Ratio	3.50
Interest Coverage Ratio	3.00