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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employee contribution to Company's profit sharing plan percentage |  | 1.00% |  |
Employee contribution to Company's profit sharing plan percentage |  | 50.00% |  |
Minimum age limit for specified additional amount |  | 50 years |  |
Company's contributions |  | $ 6,944 | $ 6,093 | $ 5,651
Bonus expense |  | 32,172 | 38,254 | 46,783
Supplemental retirement benefits cost |  | 3,211 | 4,609 | $ 3,478
Accumulated benefit obligation |  |  | 20,644 |
Accumulated benefit obligation noncurrent |  | 2,471 |  |
Accumulated benefit obligation current |  | 21,341 |  |
Forecast [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Company's contributions | $ 2,086 |  |  |
Israel [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan assets |  | 16,713 | 14,409 |
Defined benefit plan, vested benefit obligations |  | 19,692 | 17,552 |
Germany [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan assets |  | $ 5,854 | $ 5,890 |
Germany [Member] | Minimum [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan assets guaranteed rate of return |  | 2.25% |  |
Germany [Member] | Maximum [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan assets guaranteed rate of return |  | 4.25% |  |

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