BUSINESS COMBINATIONS - Purchased Credit-Impaired Loans Acquired (Details) - USD ($) $ in Thousands	Jul. 01, 2019	Jun. 29, 2018	May 25, 2018
Fidelity Southern Corporation
Business Acquisition [Line Items]
Contractually required principal and interest	$ 191,534
Non-accretable difference	(23,668)
Cash flows expected to be collected	167,866
Accretable yield	(47,173)
Total purchased credit-impaired loans acquired	$ 120,693
Atlantic Coast Financial Corporation
Business Acquisition [Line Items]
Contractually required principal and interest			$ 16,077
Non-accretable difference			(4,115)
Cash flows expected to be collected			11,962
Accretable yield			(1,199)
Total purchased credit-impaired loans acquired			$ 10,763
Hamilton State Bancshares, Inc.
Business Acquisition [Line Items]
Contractually required principal and interest		$ 21,223
Non-accretable difference		(1,840)
Cash flows expected to be collected		19,383
Accretable yield		(794)
Total purchased credit-impaired loans acquired		$ 18,589