Other Assets - Schedule of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Assets [Abstract]
Deferred income taxes	$ 89,000	$ 99,777
Overfunded pension plans	75,158	70,792
Cash surrender value of life insurance contracts	43,179	45,216
Equity method investments	31,470	0
Other(a)	49,866	33,942
Total	$ 288,673	$ 249,727