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Benefit Plans - Summary of Defined Benefit Plan, Plan Assets, Allocation (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Plan Assets, Allocation [Line Items]
Target Allocation, Percentage	100.00%
Target Allocation		$ 4,756	$ 4,089
Common stock
Defined Benefit Plan, Plan Assets, Allocation [Line Items]
Target Allocation, Percentage	35.00%
Target Allocation		1,562	1,748
Mutual funds
Defined Benefit Plan, Plan Assets, Allocation [Line Items]
Target Allocation, Percentage	25.00%
Target Allocation		2,202	856
Corporate/government bonds
Defined Benefit Plan, Plan Assets, Allocation [Line Items]
Target Allocation, Percentage	40.00%
Target Allocation		982	1,473
Cash and cash equivalents
Defined Benefit Plan, Plan Assets, Allocation [Line Items]
Target Allocation, Percentage	0.00%
Target Allocation		$ 10	$ 12

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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