INCOME TAXES (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2018
Income Tax Contingency [Line Items]
Federal statutory income tax rate,percent		33.90%	57.50%
Deferred tax liability revaluation				$ 24,080	$ 23,941
Provision (benefit) from income taxes		$ 1,560	$ 95	(22,107)	(299)
Income (loss) before taxes from continuing operations		9,002	4,547	10,117	13,147
Acquisition related costs		3,598		7,597
Acquisition related costs net of tax		2,320		5,046
Special dividend ESOP charges, net of tax			2,125
Secondary equity offering costs		(1,205)	0	(1,205)	0
Secondary equity offering costs, net of tax			795
Other adjustments		1,430	2,522
Life insurance amounts				3,220
Life insurance related costs, net of tax				2,125
Pension settlement	$ (13,715)
Pension settlement, net of tax				$ 248
Discrete benefits					$ 6,478
Effective income tax rate reconciliation, nondeductible provision (benefit) percent				33.90%	47.00%
Scenario, Forecast [Member]
Income Tax Contingency [Line Items]
Federal statutory income tax rate,percent						24.50%
Continuing Operations [Member]
Income Tax Contingency [Line Items]
Special Dividend ESOP Charges		3,220	0	$ 3,220	$ 0
Secondary equity offering costs		(1,205)		(1,205)
Postretirement Life Insurance [Member] | Continuing Operations [Member]
Income Tax Contingency [Line Items]
Income (loss) before taxes from continuing operations		9,002	4,547	10,117	13,147
Pension settlement		$ 0	$ 0	$ 2,614	$ 0