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Senior Secured Credit Facility - Additional Information (Detail) - USD ($)
12 Months Ended
Feb. 01, 2019
Dec. 22, 2017
Dec. 21, 2017
Dec. 31, 2019
Feb. 18, 2020
Dec. 31, 2018
Debt Instrument [Line Items]            
Outstanding letters of credit       $ 7,700,000   $ 7,700,000
Wells Fargo Capital Finance, LLC [Member] | Credit Facility [Member]            
Debt Instrument [Line Items]            
Existing credit facility with its lenders       $ 750,000,000.0    
Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Existing credit facility with its lenders   $ 750,000,000 $ 602,500,000      
Debt instrument maturity date description extended the maturity date of the credit facility from December 22, 2022 to January 31, 2024     extended the maturity date of the credit facility from May 21, 2019 to December 22, 2022    
Debt instrument maturity date Jan. 31, 2024 Dec. 22, 2022 May 21, 2019      
Uncommitted incremental revolving capacity   $ 250,000,000 $ 150,000,000      
Outstanding letters of credit       $ 216,900,000    
Available borrowings under our senior secured credit facility       $ 525,400,000    
Revolving Credit Facility [Member] | Subsequent Event [Member]            
Debt Instrument [Line Items]            
Outstanding letters of credit         $ 7,700,000  
Available borrowings under our senior secured credit facility         $ 559,400,000  
Revolving Credit Facility [Member] | Maximum [Member]            
Debt Instrument [Line Items]            
Unused commitment fee margin percentage       0.375%    
Revolving Credit Facility [Member] | Maximum [Member] | Letter of Credit [Member]            
Debt Instrument [Line Items]            
Margin rate lowered in applicable to Letter of Credit       2.00%    
Revolving Credit Facility [Member] | Maximum [Member] | Base Rate [Member]            
Debt Instrument [Line Items]            
Applicable margin Percentage 0.75%     1.00%    
Revolving Credit Facility [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument [Line Items]            
Applicable margin Percentage 1.75%     2.00%    
Revolving Credit Facility [Member] | Minimum [Member]            
Debt Instrument [Line Items]            
Unused commitment fee margin percentage       0.25%    
Revolving Credit Facility [Member] | Minimum [Member] | Letter of Credit [Member]            
Debt Instrument [Line Items]            
Margin rate lowered in applicable to Letter of Credit       1.50%    
Revolving Credit Facility [Member] | Minimum [Member] | Base Rate [Member]            
Debt Instrument [Line Items]            
Applicable margin Percentage 0.25%     0.50%    
Revolving Credit Facility [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument [Line Items]            
Applicable margin Percentage 1.25%     1.50%    
Letter of Credit Sub-Facility, and Guaranty [Member]            
Debt Instrument [Line Items]            
Existing credit facility with its lenders $ 30,000,000