XML 44 R28.htm IDEA: XBRL DOCUMENT v3.20.1
Debt - New Credit Facilities - Additional Information (Detail) - USD ($)
3 Months Ended
Sep. 23, 2019
Oct. 22, 2018
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Feb. 11, 2019
Debt Instrument [Line Items]            
Payments on lines of credit     $ 25,281,000 $ 20,000,000    
Line of credit     28,731,000   $ 25,822,000  
Remaining borrowing capacity     46,300,000      
Term Loan Facility            
Debt Instrument [Line Items]            
Term Loan Facility   $ 235,000,000.0 217,359,000   220,313,000  
Increase in principal balance under second amendment $ 25,000,000.0          
Long term debt maturity percentage first and second year   5.00%        
Long term debt maturity percentage third and fourth year   10.00%        
Long term debt maturity percentage fifth and sixth year   12.50%        
Term Loan Facility | Euro Rate            
Debt Instrument [Line Items]            
Interest rate margins 2.50%          
Interest rate of borrowings 0.00%          
Term Loan Facility | Base Rate Loans            
Debt Instrument [Line Items]            
Interest rate margins 1.50%          
Supplementary leverage ratio 0.25%          
Term Loan Facility | Swing Rate            
Debt Instrument [Line Items]            
Interest rate margins 1.50%          
Supplementary leverage ratio 0.25%          
Revolving Credit Facility            
Debt Instrument [Line Items]            
Line of credit   $ 50,000,000.0       $ 75,000,000.0
Reduction in interest margin applicable to all loans 0.75%          
Line of credit     28,731,000   25,822,000  
Remaining borrowing capacity         49,200,000  
Letters of Credit            
Debt Instrument [Line Items]            
Line of credit     $ 0   $ 0