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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
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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

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