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Derivative Financial Instruments - Summary of Aggregate Amount and Estimated Net Fair Values of Derivative Instruments (Detail) - Cash Flow Hedge - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Derivative Instruments Gain Loss [Line Items]    
Notional $ 400,000,000 $ 400,000,000
Fair Value of Assets 2,810,000  
Fair Value of Liabilities 19,540,000 29,842,000
Interest Rate Swap    
Derivative Instruments Gain Loss [Line Items]    
Notional 150,000,000 150,000,000
Fair Value of Liabilities 326,000 694,000
Interest Rate Collar    
Derivative Instruments Gain Loss [Line Items]    
Notional 250,000,000 250,000,000
Fair Value of Liabilities 10,570,000 13,331,000
Forward Interest Rate Swap    
Derivative Instruments Gain Loss [Line Items]    
Fair Value of Assets 2,810,000  
Fair Value of Liabilities $ 8,644,000 $ 15,817,000