BUSINESS COMBINATIONS (Details) - USD ($) $ in Thousands	1 Months Ended
	Feb. 17, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Liabilities assumed
Goodwill recognized		$ 27,076	$ 27,076	$ 25,572	$ 25,572
Merchants Bancorp
Business Acquisition [Line Items]
Cash consideration transferred	$ 12,100
Merchants Bancorp | Book Value
Identifiable assets acquired
Cash and cash equivalents	27,196
Loans receivable	115,283
CDI	0
Premises and equipment	1,769
BOLI	2,113
Accrued interest receivable and other assets	431
Total identifiable assets acquired	146,792
Liabilities assumed
Deposits	130,572
Junior subordinated debentures	5,155
Accrued expenses and other liabilities	293
Total liabilities assumed	136,020
Total identifiable net assets acquired	10,772
Merchants Bancorp | Fair Value Adjustment
Identifiable assets acquired
Cash and cash equivalents	0
Loans receivable	(3,258)
CDI	1,363
Premises and equipment	399
BOLI	0
Accrued interest receivable and other assets	90
Total identifiable assets acquired	(1,406)
Liabilities assumed
Deposits	235
Junior subordinated debentures	(1,468)
Accrued expenses and other liabilities	23
Total liabilities assumed	(1,210)
Total identifiable net assets acquired	(196)
Merchants Bancorp | Estimated Fair Value
Business Acquisition [Line Items]
Cash consideration transferred	12,080
Identifiable assets acquired
Cash and cash equivalents	27,196
Loans receivable	112,025
CDI	1,363
Premises and equipment	2,168
BOLI	2,113
Accrued interest receivable and other assets	521
Total identifiable assets acquired	145,386
Liabilities assumed
Deposits	130,807
Junior subordinated debentures	3,687
Accrued expenses and other liabilities	316
Total liabilities assumed	134,810
Total identifiable net assets acquired	10,576
Goodwill recognized	$ 1,504