Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Details)

v3.8.0.1
Debt - Additional Information (Details)
3 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Apr. 16, 2012
USD ($)
Feb. 28, 2018
USD ($)
Debt Instrument [Line Items]        
Senior credit facility expansion option, available       $ 450,000,000
Debt Instrument, actual interest rate       3.69%
Libor Rate        
Debt Instrument [Line Items]        
Debt instrument, interest rate over variable rate       2.00%
Revolving Credit Facility        
Debt Instrument [Line Items]        
Debt Instrument, Maturity Date       May 08, 2020
Maximum borrowing capacity       $ 600,000,000
Line of Credit | Senior Credit Facility - Revolver        
Debt Instrument [Line Items]        
Unused credit line       597,100,000
Unused credit line Available for Borrowing, Amount       $ 83,700,000
Senior Notes | 5.625% Senior Notes        
Debt Instrument [Line Items]        
Debt Instrument, Maturity Date       Jun. 15, 2022
Debt Instrument, Face Amount     $ 300,000,000  
Debt instrument, interest rate     5.625%  
Minimum        
Debt Instrument [Line Items]        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage       0.15%
Interest coverage ratio       3.5
Minimum | Libor Rate        
Debt Instrument [Line Items]        
Debt instrument, interest rate over variable rate       1.00%
Minimum | Base Rate        
Debt Instrument [Line Items]        
Debt instrument, interest rate over variable rate       0.00%
Minimum | Senior Notes | 5.625% Senior Notes        
Debt Instrument [Line Items]        
Debt Instrument, Redemption Price, Percentage     100.00%  
Maximum        
Debt Instrument [Line Items]        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage       0.35%
Leverage ratio       3.75
Maximum | Libor Rate        
Debt Instrument [Line Items]        
Debt instrument, interest rate over variable rate       2.25%
Maximum | Base Rate        
Debt Instrument [Line Items]        
Debt instrument, interest rate over variable rate       1.25%
Maximum | Senior Notes | 5.625% Senior Notes        
Debt Instrument [Line Items]        
Debt Instrument, Redemption Price, Percentage     102.80%  
Starting on June 30, 2016 | Senior Credit Facility - Term Loan        
Debt Instrument [Line Items]        
Quarterly installments, payable on term loan   $ 3,800,000    
Starting on June 30, 2017 | Senior Credit Facility - Term Loan        
Debt Instrument [Line Items]        
Quarterly installments, payable on term loan $ 7,500,000