Borrowings - Long-term Debt, FHLB Advances (Detail) (Federal Home Loan Bank Advances [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Federal Home Loan Bank Advances [Member]
   
Debt Instrument [Line Items]    
2013    $ 44,323
2014 4,000 4,000
2015 19,500 17,000
2016 16,500 6,500
2017 77,500 77,500
2018 25,000   
2019 10,203 11,931
2020 9,200   
Long-term Debt, Total $ 161,903 $ 161,254
Weighted Average Rate, 2013    3.10%
Weighted Average Rate, 2014 2.37% 2.37%
Weighted Average Rate, 2015 2.05% 2.25%
Weighted Average Rate, 2016 1.97% 3.99%
Weighted Average Rate, 2017 1.35% 1.35%
Weighted Average Rate, 2018 1.19%   
Weighted Average Rate, 2019 1.23% 1.23%
Weighted Average Rate, 2020 1.22%   
Weighted Average Rate 1.48% 2.05%