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Credit Facilities - Additional Information (Details) - USD ($)
Feb. 27, 2018
Mar. 31, 2020
Line of Credit Facility [Line Items]    
Line of credit, available borrowings $ 200,000,000.0  
Current borrowing capacity $ 50,000,000.0  
Outstanding borrowings   $ 0
Base Rate    
Line of Credit Facility [Line Items]    
Basis Spread on Variable Rate 0.50%  
London Interbank Offered Rate (LIBOR)    
Line of Credit Facility [Line Items]    
Basis Spread on Variable Rate 1.00%  
Minimum | Base Rate    
Line of Credit Facility [Line Items]    
Basis Spread on Variable Rate 0.25%  
Minimum | London Interbank Offered Rate (LIBOR)    
Line of Credit Facility [Line Items]    
Basis Spread on Variable Rate 1.25%  
Maximum | Base Rate    
Line of Credit Facility [Line Items]    
Basis Spread on Variable Rate 0.75%  
Maximum | London Interbank Offered Rate (LIBOR)    
Line of Credit Facility [Line Items]    
Basis Spread on Variable Rate 1.75%