Defined Contribution Plans, Pension and Other Post-Retirement Benefit Plans - Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liabilities	$ 12,065	$ 15,450
Other Postretirement Benefit Plans | U.S. Pension and Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	28	52
Noncurrent liabilities	2,248	4,974
Amount recognized	2,276	5,026
Pension Plans | Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	0	0
Noncurrent liabilities	9,841	10,360
Amount recognized	$ 9,841	$ 10,360