Other Assets - Schedule of Other Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other Assets [Abstract]
Operating lease right-of-use assets	$ 287,301	$ 287,870
Deferred income taxes	96,109	125,552
Overfunded pension plans	89,819	85,657
Cash surrender value of life insurance contracts	43,694	47,578
Other	69,730	61,759
Total	$ 586,653	$ 608,416