Future Maturities of Lease Liabilities (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Leases
2019 (remaining 9 months)	$ 52,447
2020	62,920
2021	55,817
2022	45,404
2023	41,277
Later years	183,572
Total lease payments	441,437
less imputed interest	(99,200)
Total	342,237
Finance Leases
2019 (remaining 9 months)	2,842
2020	3,375
2021	3,257
2022	3,559
2023	3,654
Later years	12,096
Total lease payments	28,783
less imputed interest	(9,434)
Total	$ 19,349