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Commitments and Contingent Liabilities - Future Minimum Lease Payments under Operating Leases (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2017 $ 25,331
2018 19,544
2019 16,833
2020 13,785
2021 10,938
Thereafter 22,760
Subtotal 109,191
Sublease income (53)
Total minimum lease payments $ 109,138