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REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Revenue from External Customer [Line Items]
BOLI	[1]									$ 734	$ 819	$ 760
Net gains on sales of loans held for sale	[1]									317	641	656
FHLMC loan servicing fees	[1]									141	122	114
Other, net										792	714	750
Total non-interest income		$ 3,008	$ 2,782	$ 3,016	$ 3,052	$ 2,663	$ 2,890	$ 2,713	$ 2,738	11,858	11,004	10,014
Asset management fees
Revenue from External Customer [Line Items]
Non-interest income										3,791	3,448	2,988
Debit card and ATM fees
Revenue from External Customer [Line Items]
Non-interest income										3,104	2,961	2,535
Deposit related fees
Revenue from External Customer [Line Items]
Non-interest income										1,721	1,628	1,486
Loan related fees
Revenue from External Customer [Line Items]
Non-interest income										$ 1,258	$ 671	$ 725
[1] Not within the scope of ASC 606

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Amount of fees received for servicing loans on behalf of FHLMC.

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Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.

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The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes.

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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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