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Debt - Amendment to Senior Secured Credit Facility - 2024 Term Loan (Details)
$ in Thousands
3 Months Ended
Feb. 01, 2018
USD ($)
Jan. 31, 2018
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Debt Instrument [Line Items]        
Repayments of debt     $ 541,812 $ 50,335
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan        
Debt Instrument [Line Items]        
Repayments of debt $ 350,000      
Cash interest payments $ 1,239      
Repurchase price, percent 1.00%      
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Minimum | Alternate Base Rate (ABR)        
Debt Instrument [Line Items]        
Basis spread on variable rate 2.50% 3.50%    
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Maximum        
Debt Instrument [Line Items]        
Basis spread on variable interest rate, increase (decrease) (0.01)      
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Maximum | London Interbank Offered Rate (LIBOR)        
Debt Instrument [Line Items]        
Basis spread on variable rate 3.50% 4.50%