Other Noncurrent Assets, Net - Summary of Other Noncurrent Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Pension asset	$ 1,948	$ 1,898
Other	1,239	1,210
Total	$ 3,187	$ 3,108