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Premises and Equipment - Future Minimum Annual Rental Payments for Non-Cancelable Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Leases [Line Items]  
2013 $ 4,861
2014 4,114
2015 3,347
2016 2,597
2017 1,777
Succeeding years 2,676
Total minimum payments required $ 19,372