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Composition of Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Federal funds purchased		$ 16,000
Securities sold under agreements to repurchase:
Securities sold under agreements to repurchase	114,439	118,308
FHLB borrowings	115,000	150,000
Subordinated debt	15,464	15,464
Other debt	583	624
Total borrowings	245,486	300,396
Retail
Securities sold under agreements to repurchase:
Securities sold under agreements to repurchase	64,439	68,308
Wholesale
Securities sold under agreements to repurchase:
Securities sold under agreements to repurchase	$ 50,000	$ 50,000

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Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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