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