Debt - Additional Information (Details)
1 Months Ended 9 Months Ended
Nov. 30, 2017
USD ($)
Sep. 27, 2019
USD ($)
letters_of_credit
Debt Instrument [Line Items]    
Credit facility, additional available borrowings $ 100,000,000.0  
Letters of credit    
Debt Instrument [Line Items]    
Number of letters of credit outstanding | letters_of_credit   7
Letters of credit outstanding   $ 8,100,000
Senior secured credit facilities    
Debt Instrument [Line Items]    
Credit facility, maximum borrowing capacity 200,000,000  
Covenant terms, ratio of total indebtedness to combined EBITDA   3.00
Covenant terms, maximum debt to EBITDA ratio, twelve months following purchase   3.25
Covenant terms, ratio of EBITDA to interest expense, net,   4.50
Ratio of total indebtedness to combined EBITDA   1.04
Ratio of combined EBITDA to combined interest expense   11.02
Interest rate   4.12%
Senior secured credit facilities | London Interbank Offered Rate (LIBOR) | Minimum    
Debt Instrument [Line Items]    
Spread on variable rate   1.75%
Senior secured credit facilities | London Interbank Offered Rate (LIBOR) | Maximum    
Debt Instrument [Line Items]    
Spread on variable rate   2.50%
Senior secured credit facilities | Base Rate | Minimum    
Debt Instrument [Line Items]    
Spread on variable rate   0.75%
Senior secured credit facilities | Base Rate | Maximum    
Debt Instrument [Line Items]    
Spread on variable rate   1.50%
Term facility | Line of Credit    
Debt Instrument [Line Items]    
Credit facility, maximum borrowing capacity $ 80,000,000  
Debt instrument, term 5 years  
Revolver | Line of Credit    
Debt Instrument [Line Items]    
Credit facility, maximum borrowing capacity $ 120,000,000  
Debt instrument, term 5 years  
Available borrowing capacity   $ 111,900,000
Unsecured debt    
Debt Instrument [Line Items]    
Credit facility, maximum borrowing capacity $ 75,000,000.0  
Amended revolver | Line of Credit    
Debt Instrument [Line Items]    
Credit facility, maximum borrowing capacity $ 25,000,000.0