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RECENT ACCOUNTING PRONOUNCEMENTS (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2017
Jun. 30, 2018
Jun. 30, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]      
Reclassified mortgage-backed seurities $ 12,619 $ 12,619
Reclassified adjustment from AOCI to retained earnings   $ 188