INVESTMENT SECURITIES (Other Investments) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
FHLB Stock, par value (in usd per share)	$ 100		$ 100
Purchases of FHLB stock	$ 29,900,000		$ 148,500,000
FHLB stock redeemed	$ 135,900,000		311,900,000
Gain (loss) on redemption of FHLB stock			$ 0
Purchase of FRB stock		$ 0		$ 0