CREDIT QUALITY ASSESSMENT (Summary of Impaired Loans) (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit Quality Assessment [Abstract]
Impaired loans with a specific allowance	$ 12,876	$ 11,693	$ 13,563
Impaired loans without a specific allowance	9,334	9,116	10,529
Total impaired loans	22,210	20,809	24,092
Allowance for loan and lease losses related to impaired loans	4,924	4,014	4,825
Allowance for loan and lease losses related to loans collectively evaluated	48,562	41,243	39,242
Total allowance for loan and lease losses	53,486	45,257	44,067
Average impaired loans for the period	20,211	23,179	26,382
Contractual interest income due on impaired loans during the period	2,513	2,314	2,082
Interest income on impaired loans recognized on a cash basis	506	754	511
Interest income on impaired loans recognized on an accrual basis	$ 138	$ 169	$ 186

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Loans and Leases Receivable, Impaired, Contractual Interest Income

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No definition available.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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