Leases - Summary of Maturity of Lease Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Leases
2019	$ 17,510
2020	18,429
2021	15,377
2022	12,313
2023	8,779
Thereafter	23,301
Total lease payments	95,709
Less: Interest	20,284
Operating lease liability	75,425	$ 77,000
Finance Leases
2019	15,984
2020	21,311
2021	21,837
2022	20,101
2023	14,522
Thereafter	14,073
Total lease payments	107,828
Less: Amounts Representing Interest on Finance Leases	9,558
Present value of lease liabilities	$ 98,270		$ 102,859