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Future Minimum Annual Rental Commitments Under Various Non-cancellable Operating Leases (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases [Abstract]  
2019 $ 12,907
2020 12,470
2021 11,542
2022 10,354
2023 9,379
2024-2032 28,268
Total Minimum Operating Lease Payments $ 84,920