Quarterly report pursuant to Section 13 or 15(d)

Estimated Fair Values of Financial Instruments (Detail)

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Estimated Fair Values of Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Financial Assets:    
Restricted Cash $ 4,393 $ 1,818
Investment Securities Available for Sale 410,210 381,862
Investment Securities Held to Maturity   59,363
Accrued Interest Receivable 7,467 7,829
Investment in Federal Reserve Bank 10,261 8,558
Financial Liabilities:    
Noninterest-Bearing Deposits 694,345 634,466
Interest-Bearing Deposits 1,669,040 1,710,444
Accrued Interest Payable 15,266 16,032
Carrying or Contract Amount [Member]
   
Financial Assets:    
Cash and Cash Equivalents 302,428 201,683
Restricted Cash 4,393 1,818
Term Federal Funds 55,000 115,000
Investment Securities Available for Sale 410,210 381,862
Investment Securities Held to Maturity   59,742
Loans Receivable, Net of Allowance for Loan Losses 1,892,813 1,849,020
Loans Held for Sale 10,736 22,587
Accrued Interest Receivable 7,467 7,829
Investment in Federal Home Loan Bank Stock 19,621 22,854
Investment in Federal Reserve Bank 10,261 8,558
Financial Liabilities:    
Noninterest-Bearing Deposits 694,345 634,466
Interest-Bearing Deposits 1,669,040 1,710,444
Borrowings 85,435 85,709
Accrued Interest Payable 15,266 16,032
Off-Balance Sheet Items:    
Commitments to Extend Credit 205,833 158,748
Standby Letters of Credit 10,544 12,742
Estimated Fair Value [Member]
   
Financial Assets:    
Cash and Cash Equivalents 302,428 201,683
Restricted Cash 4,393 1,818
Term Federal Funds 55,015 115,173
Investment Securities Available for Sale 410,210 381,862
Investment Securities Held to Maturity   59,363
Loans Receivable, Net of Allowance for Loan Losses 1,833,112 1,802,511
Loans Held for Sale 10,736 22,587
Accrued Interest Receivable 7,467 7,829
Investment in Federal Home Loan Bank Stock 19,621 22,854
Investment in Federal Reserve Bank 10,261 8,558
Financial Liabilities:    
Noninterest-Bearing Deposits 694,345 634,466
Interest-Bearing Deposits 1,675,056 1,710,878
Borrowings 85,517 83,853
Accrued Interest Payable 15,266 16,032
Off-Balance Sheet Items:    
Commitments to Extend Credit 175 194
Standby Letters of Credit $ 26 $ 26