ALLOWANCE FOR LOAN LOSSES - Balances in Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for Loan Losses:
Individually evaluated for impairment	$ 189	$ 1,708
Collectively evaluated for impairment	31,229	29,999
Loans acquired with deteriorated credit quality	0	0
Total Allowance for Loan Losses	31,418	31,707	$ 25,904	$ 20,744
Loans:
Individually evaluated for impairment	19,355	22,492
Collectively evaluated for impairment	3,248,885	3,072,186
Loans acquired with deteriorated credit quality	532	3,575
Total Loans	3,268,772	3,098,253
Commercial Real Estate \| Mortgage loans
Allowance for Loan Losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	10,792	11,048
Loans acquired with deteriorated credit quality	0	0
Total Allowance for Loan Losses	10,792	11,048	9,225	7,850
Loans:
Individually evaluated for impairment	3,084	11,162
Collectively evaluated for impairment	1,370,472	1,281,837
Loans acquired with deteriorated credit quality	0	907
Total Loans	1,373,556	1,293,906
Multi-family \| Mortgage loans
Allowance for Loan Losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,566	4,521
Loans acquired with deteriorated credit quality	0	0
Total Allowance for Loan Losses	2,566	4,521	6,264	4,208
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	585,827	593,645
Loans acquired with deteriorated credit quality	0	1,635
Total Loans	585,827	595,280
Residential real estate mortgage loans \| Mortgage loans
Allowance for Loan Losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	3,935	2,438
Loans acquired with deteriorated credit quality	0	0
Total Allowance for Loan Losses	3,935	2,438	1,495	2,115
Loans:
Individually evaluated for impairment	0	100
Collectively evaluated for impairment	519,455	463,575
Loans acquired with deteriorated credit quality	308	589
Total Loans	519,763	464,264
Commercial, industrial and agricultural loans
Allowance for Loan Losses:
Individually evaluated for impairment	189	1,708
Collectively evaluated for impairment	12,533	11,130
Loans acquired with deteriorated credit quality	0	0
Total Allowance for Loan Losses	12,722	12,838	7,837	5,405
Loans:
Individually evaluated for impairment	16,271	11,230
Collectively evaluated for impairment	629,229	604,329
Loans acquired with deteriorated credit quality	224	444
Total Loans	645,724	616,003
Real estate construction and land loans
Allowance for Loan Losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1,297	740
Loans acquired with deteriorated credit quality	0	0
Total Allowance for Loan Losses	1,297	740	955	1,030
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	123,393	107,759
Loans acquired with deteriorated credit quality	0	0
Total Loans	123,393	107,759
Installment/consumer loans
Allowance for Loan Losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	106	122
Loans acquired with deteriorated credit quality	0	0
Total Allowance for Loan Losses	106	122	$ 128	$ 136
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	20,509	21,041
Loans acquired with deteriorated credit quality	0	0
Total Loans	$ 20,509	$ 21,041

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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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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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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. 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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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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