Derivative Financial Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Interest rate cash flow hedge increase decrease interest expense to be reclassified during next 12 months (less than)	$ 400,000
Interest rate cash flow hedge gain (loss) reclassified to earnings, net	900,000
Notional	502,172,000	$ 167,933,000
Termination value of derivatives	966,000	$ (2,664,000)
Collateral value against obligations	5,400,000
Accrued Liabilities
Derivatives, Fair Value [Line Items]
Termination value of derivatives	800,000
Cash Flow Hedges of Interest Rate Risk
Derivatives, Fair Value [Line Items]
Derivative hedge ineffectiveness gain (loss)	$ 0
Maximum period of hedged in cash flow hedge	1 month

Fair value of securities received as collateral against derivative assets.

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

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Amount of gain (loss) from the ineffectiveness of the hedge.

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Nominal or face amount used to calculate payment on derivative.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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