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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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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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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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Summary of Ending Loan Balances Evaluated for Impairment and Related Allowance for Loan Losses Allocation (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	$ 14,999		$ 17,350
Loans, Collectively evaluated for impairment	816,934		764,363
Total Loans	831,933		781,713
Allowance for loan losses, Individually evaluated for impairment	234		289
Allowance for loan losses, Collectively evaluated for impairment	13,206		13,279
Allowance for loan losses, Total	13,440	$ 13,347	13,568	$ 13,852	$ 14,461	$ 14,747
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	82,616		73,625
Municipal
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	61,568		57,511
Installment and other loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans	7,322		7,521
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	10,134		11,832
Loans, Collectively evaluated for impairment	557,776		508,270
Total Loans	567,910		520,102
Allowance for loan losses, Individually evaluated for impairment	126		0
Allowance for loan losses, Collectively evaluated for impairment	9,803		9,803
Allowance for loan losses, Total	9,929	9,827	9,803	9,815	10,720	11,148
Commercial \| Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	9,658		11,093
Loans, Collectively evaluated for impairment	382,606		327,170
Total Loans	392,264		338,263
Allowance for loan losses, Individually evaluated for impairment	0		0
Allowance for loan losses, Collectively evaluated for impairment	8,133		7,883
Allowance for loan losses, Total	8,133	7,996	7,883	8,132	9,346	9,462
Commercial \| Acquisition and Development
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	2		5
Loans, Collectively evaluated for impairment	31,460		50,698
Total Loans	31,462		50,703
Allowance for loan losses, Individually evaluated for impairment	0		0
Allowance for loan losses, Collectively evaluated for impairment	587		850
Allowance for loan losses, Total	587	739	850	720	588	697
Commercial \| Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	474		734
Loans, Collectively evaluated for impairment	82,142		72,891
Total Loans	82,616		73,625
Allowance for loan losses, Individually evaluated for impairment	126		0
Allowance for loan losses, Collectively evaluated for impairment	1,022		1,012
Allowance for loan losses, Total	1,148	1,030	1,012	844	665	806
Commercial \| Municipal
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	0		0
Loans, Collectively evaluated for impairment	61,568		57,511
Total Loans	61,568		57,511
Allowance for loan losses, Individually evaluated for impairment	0		0
Allowance for loan losses, Collectively evaluated for impairment	61		58
Allowance for loan losses, Total	61	62	58	119	121	183
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	4,865		5,518
Loans, Collectively evaluated for impairment	259,158		256,093
Total Loans	264,023		261,611
Allowance for loan losses, Individually evaluated for impairment	108		289
Allowance for loan losses, Collectively evaluated for impairment	2,778		2,702
Allowance for loan losses, Total	2,886	2,856	2,991	3,100	2,683	2,381
Consumer \| Residential Mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	4,855		5,501
Loans, Collectively evaluated for impairment	251,846		248,589
Total Loans	256,701		254,090
Allowance for loan losses, Individually evaluated for impairment	106		281
Allowance for loan losses, Collectively evaluated for impairment	2,600		2,589
Allowance for loan losses, Total	2,706	2,677	2,870	2,918	2,567	2,262
Consumer \| Installment and other loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	10		17
Loans, Collectively evaluated for impairment	7,312		7,504
Total Loans	7,322		7,521
Allowance for loan losses, Individually evaluated for impairment	2		8
Allowance for loan losses, Collectively evaluated for impairment	178		113
Allowance for loan losses, Total	180	179	121	182	116	119
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Individually evaluated for impairment	0		0
Loans, Collectively evaluated for impairment	0		0
Total Loans	0		0
Allowance for loan losses, Individually evaluated for impairment	0		0
Allowance for loan losses, Collectively evaluated for impairment	625		774
Allowance for loan losses, Total	$ 625	$ 664	$ 774	$ 937	$ 1,058	$ 1,218