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Employee Benefit Plans - Schedule of Defined Benefit Plan Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan assets, amount | $ 11,093 | $ 7,822
Defined benefit plan assets, percentage | 100.00% | 100.00%
Cash [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan assets, amount | $ 430 | $ 193
Defined benefit plan assets, percentage | 4.00% | 2.00%
Debt Securities [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan assets, amount | $ 8,023 | $ 4,855
Defined benefit plan assets, percentage | 72.00% | 62.00%
Equity Securities [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan assets, amount | $ 1,519 | $ 1,342
Defined benefit plan assets, percentage | 14.00% | 17.00%
Other [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan assets, amount | $ 1,121 | $ 1,432
Defined benefit plan assets, percentage | 10.00% | 19.00%

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