Debt Credit Facility Interest Rates (Details)	3 Months Ended
	Mar. 31, 2014
Term Loan B [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%
Revolver [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%
Minimum [Member] | Letter of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.75%
Minimum [Member] | Unused Revolver
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	0.35%
Maximum [Member] | Letter of Credit
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	2.75%
Maximum [Member] | Unused Revolver
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	0.375%
London Interbank Offered Rate (LIBOR) [Member] | Term Loan B [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.50%
London Interbank Offered Rate (LIBOR) [Member] | Revolver [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.50%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%
Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.75%
Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%