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Summary of Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Securities sold under agreements to repurchase	$ 121,506	$ 136,118
FHLB borrowings	150,000	161,558
Subordinated debt	15,464	15,464
Other debt	413	413
Total	$ 287,383	$ 313,553

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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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