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Income taxes - Deferred tax assets and liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Tax loss and credit carryforwards | $ 180,782 | $ 174,997
Lease assets | 25,429 | 28,577
Pension | 12,237 | 14,971
Reserves and accruals | 72,931 | 60,799
Other | 7,996 | 3,207
Less: valuation allowances | (155,008) | (119,233)
Total deferred tax assets | 144,367 | 163,318
Deferred tax liabilities: |  |
Property, plant and equipment | 25,633 | 23,053
Intangibles — stock acquisitions | 476,150 | 441,079
Unremitted non-U.S. earnings | 91,539 | 81,967
Lease liabilities | 25,429 | 28,577
Other | 2,221 | 22,628
Total deferred tax liabilities | 620,972 | 597,304
Net deferred tax liability | $ (476,605) | $ (433,986)

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