LOANS (excluding covered loans) - Commercial and Consumer Credit Exposure by Risk Attribute (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Commercial	$ 1,035,668	$ 861,033
Real Estate - Construction	80,741	73,517
Real Estate - Commercial	1,496,987	1,417,008
Real Estate Residential	352,931	318,210
Installment	47,133	56,810
Home equity	376,454	367,500
Non Covered Loans
Financing Receivable, Recorded Investment [Line Items]
Commercial	1,035,668	861,033
Real Estate - Construction	80,741	73,517
Real Estate - Commercial	1,496,987	1,417,008
Total Commercial	2,613,396	2,351,558
Real Estate Residential	352,931	318,210
Installment	47,133	56,810
Home equity	376,454	367,500
Other	115,727	84,986
Total	892,245	827,506
Non Covered Loans \| Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial	991,161	803,351
Real Estate - Construction	78,872	64,866
Real Estate - Commercial	1,422,215	1,307,370
Total Commercial	2,492,248	2,175,587
Non Covered Loans \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Commercial	23,053	29,663
Real Estate - Construction	65	65
Real Estate - Commercial	23,832	38,516
Total Commercial	46,950	68,244
Non Covered Loans \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Commercial	21,454	28,019
Real Estate - Construction	1,804	8,586
Real Estate - Commercial	50,940	71,122
Total Commercial	74,198	107,727
Non Covered Loans \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Commercial	0	0
Real Estate - Construction	0	0
Real Estate - Commercial	0	0
Total Commercial	0	0
Non Covered Loans \| Performing
Financing Receivable, Recorded Investment [Line Items]
Real Estate Residential	344,325	310,341
Installment	46,559	56,358
Home equity	373,472	364,248
Other	115,727	84,490
Total	880,083	815,437
Non Covered Loans \| Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Real Estate Residential	8,606	7,869
Installment	574	452
Home equity	2,982	3,252
Other	0	496
Total	$ 12,162	$ 12,069

Loans and Leases Receivable, Gross, Total of Commercial, Consumer Real Estate/Construction and Commercial Mortgage

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Amount before allowance of commercial loans and leases receivable includes, but not limited to, commercial and industrial loans, agricultural loans, mortgage loans, promissory notes, interbank and other loans to financial institutions, draws against credit facilities, trade financing, lease financings. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of consumer loans, including, but not limited to, mortgage, home equity, vehicles, credit card, installment, and lease financing. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of revolving, open-end loan, extended under a line of credit and secured by the borrower's residential property. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of consumer loans to acquire durable goods, including, but not limited to, automobiles, recreational vehicles, boats, refrigerators, washers and dryers. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of consumer mortgage. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes subordinated loans such as home equity lines of credit and loans and leases covered under loss sharing agreements.

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Amount before allowance of consumer real estate loans. Includes, but not limited to, construction financing, residential mortgage loans, and home equity lines of credit. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of other loans and leases not otherwise specified in the taxonomy. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of mortgage loans on existing land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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