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Debt (Additional Information) (Details) - USD ($)
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Debt [Line Items]      
Repayment of debt $ 8,633,000 $ 14,514,000  
Committed Revolving Credit Facilities [Member]      
Debt [Line Items]      
Maximum borrowing capacity 472,658,000    
Available borrowing capacity $ 468,224,000    
Revolving Credit Facility [Member]      
Debt [Line Items]      
Weighted average interest rate 1.90%   2.30%