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Stockholders' Equity - Tax Effects Related to the Change in Each Component of Other Comprehensive Loss (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Equity [Abstract] |  |
Unrealized gain (loss) on available-for-sale securities, Before-Tax Amount | $ (1,258) | $ 312
Unrealized gain (loss) on available-for-sale securities, Tax (Expense) Benefit | 327 | (81)
Unrealized gain (loss) on available-for-sale securities, Net-of-Tax Amount | (931) | 231
Reclassification adjustment for amounts related to available-for-sale investments included in net income (loss), Before-Tax Amount | 1,416 | (62)
Reclassification adjustment for amounts related to available-for-sale investments included in net income (loss), Tax (Expense) Benefit | (368) | 16
Reclassification adjustment for amounts related to available-for-sale investments included in net income (loss), Net-of-Tax Amount | 1,048 | (46)
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income (loss), Before-Tax Amount | 204 | 175
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income (loss), Tax (Expense) Benefit | (63) | (54)
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income (loss), Net-of-Tax Amount | 141 | 121
Foreign currency translation adjustment, Before-Tax Amount | (1,650) | (1,160)
Foreign currency translation adjustment, Net-of-Tax Amount | (1,650) | (1,160)
Total Other Comprehensive Income (Loss), Before-Tax Amount | (1,288) | (735)
Total Other Comprehensive Income (Loss), Tax (Expense) Benefit | (104) | (119)
Other Comprehensive Loss, net of tax | $ (1,392) | $ (854)

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