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Stockholders' Equity - Tax Effects Related to the Change in Each Component of Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Equity [Abstract] |  |
Unrealized gains (losses) on available-for-sale securities, Before-Tax Amount | $ 312 | $ (347)
Unrealized gains (losses) on available-for-sale securities, Tax (Expense) Benefit | (81) | 90
Unrealized gains (losses) on available-for-sale securities, Net-of-Tax Amount | 231 | (257)
Reclassification adjustment for amounts related to available-for-sale investments included in net income, Before-Tax Amount | (62) | 73
Reclassification adjustment for amounts related to available-for-sale investments included in net income, Tax (Expense) Benefit | 16 | (8)
Reclassification adjustment for amounts related to available-for-sale investments included in net income, Net-of-Tax Amount | (46) | 65
Reclassification adjustment for amounts related to cash flow hedges included in net income, Before-Tax Amount |  | (3,220)
Reclassification adjustment for amounts related to cash flow hedges included in net income, Net-of-Tax Amount |  | (3,220)
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income, Before-Tax Amount | 175 | 90
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income, Tax (Expense) Benefit | (54) | (28)
Reclassification adjustment for amounts related to defined benefit plan adjustments included in net income, Net-of-Tax Amount | 121 | 62
Foreign currency translation adjustment, Before-Tax Amount | (1,160) | 842
Foreign currency translation adjustment, Net-of-Tax Amount | (1,160) | 842
Total Other Comprehensive Income (Loss), Before-Tax Amount | (735) | (2,562)
Total Other Comprehensive Income (Loss), Tax (Expense) Benefit | (119) | 54
Other Comprehensive Loss, net of tax | $ (854) | $ (2,508)

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