Pension and Other Postretirement Benefits - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Pension Plan [Member] | U.S. [Member]
Accumulated other comprehensive loss:
Net actuarial loss (gain)	$ 45,041	$ 47,252
Prior service cost (credit)	91	156
Total	45,132	47,408
Defined Benefit Pension Plan [Member] | Foreign Pension Benefits [Member]
Accumulated other comprehensive loss:
Net actuarial loss (gain)	22,149	25,914
Prior service cost (credit)	(7,402)	(9,174)
Total	14,747	16,740
Other Postretirement Benefit Plans [Member]
Accumulated other comprehensive loss:
Net actuarial loss (gain)	(2,123)	(1,211)
Prior service cost (credit)	(12,202)	(13,809)
Total	$ (14,325)	$ (15,020)