Future Minimum Rental Payments under Lease Commitments (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Capital Leases
2019	$ 3,996
2020	3,345
2021	3,227
2022	3,508
2023	3,624
Later years	12,070
Total minimum rental	29,770
Less: Amount representing interest	(9,829)
Present value of minimum rental commitments	19,941
Less: Current portion of capital lease obligations	(2,128)
Long-term portion of capital lease obligations	17,813
Operating Leases
2019	72,353
2020	59,492
2021	48,891
2022	35,233
2023	28,839
Later years	123,039
Total minimum rental	$ 367,847