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Premises and Equipment - Future Minimum Annual Rental Payments for Noncancelable Leases (Detail)
$ in Thousands
Dec. 31, 2015
USD ($)
Leases [Abstract]  
2016 $ 5,307
2017 4,905
2018 3,500
2019 2,213
2020 1,232
Thereafter 1,435
Total $ 18,592