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Consolidated Statements of Changes in Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statement Of Stockholders Equity [Abstract] |  |  |
Foreign currency translation adjustments, income tax effect | $ 6,824 |  |
Amortization of terminated hedge, income tax effect |  |  | $ 60
Unrealized loss on marketable security, income tax effect |  | $ (809) | (831)
Unrealized derivative gains and losses on cash flow hedges, income tax effect | 667 | 2,490 | 536
Minimum pension liability, income tax effect | (1,650) | $ (983) | $ (5,003)
Cumulative-effect adjustment due to adoption of ASU 2016-01, income tax effect | $ 1,045 |  |

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