Annual report pursuant to Section 13 and 15(d)

Deposits - Summary of Interest Expense on Deposits (Detail)

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Deposits - Summary of Interest Expense on Deposits (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Deposits [Line Items]      
Savings $ 2,152 $ 2,757 $ 3,439
Money Market Checking and NOW Accounts 3,085 3,461 4,936
Time Deposits of $100,000 or More 7,290 13,855 19,529
Other Time Deposits 3,350 3,885 6,504
Total Interest Expense on Deposits $ 15,877 $ 23,958 $ 34,408