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Debt Credit Facility Interest Rates (Details)
6 Months Ended
Jun. 30, 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]  
Interest rate, minimum rate range 1.75%
Minimum [Member] | Unused Revolver
 
Line of Credit Facility [Line Items]  
Interest rate, minimum rate range 0.35%
Maximum [Member] | Letter of Credit
 
Line of Credit Facility [Line Items]  
Interest rate, maximum rate range 2.75%
Maximum [Member] | Unused Revolver
 
Line of Credit Facility [Line Items]  
Interest rate, maximum rate range 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%