XML 58 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
LONG-TERM DEBT - Credit Facility (Detail)
3 Months Ended
Jun. 30, 2018
USD ($)
Sep. 30, 2018
USD ($)
Line of Credit    
Debt Instrument [Line Items]    
Debt instrument, term 5 years  
Net leverage ratio 2.25  
Line of credit facility, remaining borrowing capacity   $ 132,679,000
Line of Credit | LIBOR    
Debt Instrument [Line Items]    
Floor interest rate received 1.25%  
Line of Credit | Maximum | LIBOR    
Debt Instrument [Line Items]    
Floor interest rate received 2.00%  
Secured Debt | Term Facility due 2023 (Term Loan A Facility) | Line of Credit    
Debt Instrument [Line Items]    
Aggregate principal amount $ 350,000,000  
Secured Debt | Term Loan B Facility due October 2023; bore interest at LIBOR plus 2.50%    
Debt Instrument [Line Items]    
Aggregate principal amount 350,000,000  
Revolving Credit Facility | Revolving Credit Facility Due 2023 | Line of Credit    
Debt Instrument [Line Items]    
Credit facility maximum 200,000,000  
Letters of credit outstanding, amount   $ 22,521,000
Line of Credit | Refinanced Revolving Credit Facility due October 2021; bore interest at LIBOR plus 2.75% | Revolving Credit Facility    
Debt Instrument [Line Items]    
Credit facility maximum 160,000,000  
Senior Secured Asset Based Revolving Credit Facility Due Two Thousand And Twenty Three    
Debt Instrument [Line Items]    
Additional revolver capacity $ 125,000,000