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Debt and Short-Term Borrowings - Additional Information (Detail)
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 05, 2020
USD ($)
Apr. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2018
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
agreement
Nov. 27, 2018
USD ($)
Debt Instrument [Line Items]              
Gains reclassified from accumulated other comprehensive loss into income     $ 1,400,000   $ 1,600,000    
Losses expected to be reclassified from accumulated other comprehensive loss into income in the next 12 months     6,800,000   6,800,000    
Interest Rate Swap Maturing April 2020 Agreement              
Debt Instrument [Line Items]              
Notional amount     $ 200,000,000   $ 200,000,000    
Fixed rate     1.9225%   1.9225%    
Credit Agreement 2018              
Debt Instrument [Line Items]              
Mandatory prepayment trigger, maximum value of excess cash flow       $ 10,000,000      
Credit Facility | Credit Agreement 2018              
Debt Instrument [Line Items]              
Credit facility, payment $ 17,000,000.0            
Notes Payable | December 2019 Financing Agreement              
Debt Instrument [Line Items]              
Non interest bearing financing agreement           $ 2,400,000  
Notes payable     $ 1,500,000   $ 1,500,000 $ 2,400,000  
Number of financing agreements | agreement           2  
Term A due on November 27,2023 | Credit Facility              
Debt Instrument [Line Items]              
Secured credit facilities     $ 195,500,000   $ 195,500,000    
Fixed rate     1.75%   1.75% 2.00%  
Term A due on November 27,2023 | Credit Facility | Credit Agreement 2018              
Debt Instrument [Line Items]              
Maximum amount under credit facilities             $ 220,000,000.0
Term B due on November 27, 2024 | Credit Facility              
Debt Instrument [Line Items]              
Secured credit facilities     $ 311,100,000   $ 311,100,000    
Term B due on November 27, 2024 | Credit Facility | Credit Agreement 2018              
Debt Instrument [Line Items]              
Maximum amount under credit facilities             325,000,000.0
Senior Secured Revolving Credit Facility | Credit Facility              
Debt Instrument [Line Items]              
Additional borrowing capacity available under the revolving facility     $ 86,700,000   $ 86,700,000    
Revolving credit facility draw down   $ (30,000,000)          
Senior Secured Revolving Credit Facility | Credit Facility | Credit Agreement 2018              
Debt Instrument [Line Items]              
Maximum amount under credit facilities             $ 125,000,000.0