Income taxes - deferred tax assets and liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Tax loss and credit carryforwards	$ 136,046	$ 123,328
Pension	46,563	57,610
Reserves and accruals	52,343	47,755
Other	17,704	34,568
Less: valuation allowances	(104,520)	(103,475)
Total deferred tax assets	148,136	159,786
Deferred tax liabilities:
Property, plant and equipment	32,209	33,824
Intangibles — stock acquisitions	321,707	361,132
Unremitted foreign earnings	63,419	78,019
Other	466	453
Total deferred tax liabilities	417,801	473,428
Net deferred tax liability	$ (269,665)	$ (313,642)