INVESTMENTS (Schedule of Unrealized Gross Losses and Estimated Fair values of Investment Securities) (Details) $ in Thousands	Sep. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	362	180
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 346,711	$ 871,583
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	34,549	14,074
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	372,004	101,074
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(75,787)	(3,656)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	718,715	972,657
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 110,336	$ 17,730
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	101
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 51,026
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,774
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	51,026
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,774
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	172	113
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 203,082	$ 659,851
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	24,432	8,999
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	322,251	61,978
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(68,505)	(2,469)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	525,333	721,829
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 92,937	$ 11,468
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	76	56
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 83,532	$ 191,456
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	7,433	4,602
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	38,279	38,117
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(5,628)	(1,165)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	121,811	229,573
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 13,061	$ 5,767
Subordinated corporate bonds
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	13	7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 9,071	$ 11,932
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	910	232
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	11,474	979
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,654)	(22)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	20,545	12,911
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 2,564	$ 254
US Government-sponsored Enterprises Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security		4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 8,344
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		241
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Debt Securities, Available-for-sale, Unrealized Loss Position, Total		8,344
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 241

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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