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Long Term Debt - Term Loan Agreement - Additional Information (Detail) - Term Loan Agreement - USD ($)
6 Months Ended
Dec. 16, 2019
Aug. 22, 2019
Jun. 30, 2020
Debt Instrument [Line Items]      
Credit agreement date     Aug. 22, 2019
Credit facility, maximum borrowing capacity   $ 150,000,000  
Debt maturity date   Jun. 10, 2022  
Percentage of net cash proceeds from issuance of new senior indebtedness     100.00%
Term Loan, amount outstanding     $ 100,000,000
Minimum      
Debt Instrument [Line Items]      
Debt service coverage ratio     150.00%
Maximum      
Debt Instrument [Line Items]      
Debt to capitalization ratio, percentage the Company must not exceed at any time     50.00%
London Interbank Offered Rate (LIBOR)      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate     1.375%
LIBOR interest rate     1.55%
London Interbank Offered Rate (LIBOR) | Minimum      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate     1.00%
London Interbank Offered Rate (LIBOR) | Maximum      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate     1.375%
Base Rate      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate     0.375%
Base Rate | Minimum      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate     0.00%
Base Rate | Maximum      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate     0.375%
Subject To Customary Conditions      
Debt Instrument [Line Items]      
Credit facility, maximum borrowing capacity   $ 225,000,000  
Credit facility, additional borrowing capacity   $ 75,000,000  
Repayments of borrowings $ 50,000,000