Schedule of Maturity of Lease Liabilities by Lease Classification (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating Leases, 2019	$ 209,134
Operating Leases, 2020	265,866
Operating Leases, 2021	248,804
Operating Leases, 2022	219,925
Operating Leases, 2023	189,116
Operating Leases, After 2023	674,349
Operating Leases, Total lease payments	1,807,194
Operating Leases, Less: Interest	311,490
Operating Leases, Present value of lease liabilities	1,495,704
Finance Leases, 2019	16,683
Finance Leases, 2020	22,373
Finance Leases, 2021	18,661
Finance Leases, 2022	17,925
Finance Leases, 2023	17,236
Finance Leases, After 2023	101,109
Finance Leases, Total lease payments	193,987
Finance Leases, Less: Interest	44,829
Finance Leases, Present value of lease liabilities	149,158
Total Leases, 2019	225,817
Total Leases, 2020	288,239
Total Leases, 2021	267,465
Total Leases, 2022	237,850
Total Leases, 2023	206,352
Total Leases, After 2023	775,458
Toatal Leases, Total lease payments	2,001,181
Total Leases, Less: Interest	356,319
Total Leases, Present value of lease liabilities	$ 1,644,862