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Mortgage Servicing Rights - Estimated Amortization Expense of Mortgage Servicing Rights (Detail) (Mortgage Servicing Rights [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Mortgage Servicing Rights [Member]
 
Finite-Lived Intangible Assets [Line Items]  
Remainder of 2014 $ 206
2015 799
2016 693
2017 596
2018 511
Thereafter $ 2,620