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Revolving Credit Facility (Details) - Credit Facility
3 Months Ended
Jun. 30, 2018
USD ($)
Line of Credit Facility [Line Items]  
Line of credit facility maximum borrowing capacity $ 300,000,000
Covenant terms, leverage ratio requirement 300.00%
Covenant terms fixed charge ratio requirement 125.00%
Long-term line of credit, noncurrent $ 0
Minimum  
Line of Credit Facility [Line Items]  
Line of credit facility, unused capacity, commitment fee percentage 0.20%
Maximum  
Line of Credit Facility [Line Items]  
Line of credit facility, unused capacity, commitment fee percentage 0.30%
Base Rate | Minimum  
Line of Credit Facility [Line Items]  
Basis spread on variable rate 0.00%
Base Rate | Maximum  
Line of Credit Facility [Line Items]  
Basis spread on variable rate 0.50%
London Interbank Offered Rate (LIBOR) | Minimum  
Line of Credit Facility [Line Items]  
Basis spread on variable rate 1.25%
London Interbank Offered Rate (LIBOR) | Maximum  
Line of Credit Facility [Line Items]  
Basis spread on variable rate 2.00%