SECURITIES (Securities with Continuous Loss Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,462,517	$ 1,359,199
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(137,551)	(38,379)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,222,815	811,239
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(293,658)	(12,715)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	2,685,332	2,170,438
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	431,209	51,094
U.S. Government and agency obligations
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	33,407	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(882)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	16,732	71,306
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(362)	(621)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	50,139	71,306
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	1,244	621
Municipal bonds
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	188,920	40,397
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(25,592)	(221)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	33,907	8,541
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(15,178)	(99)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	222,827	48,938
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	40,770	320
Corporate bonds
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	108,187	8,009
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(9,547)	(121)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	13,066	9,938
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,934)	(62)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	121,253	17,947
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	11,481	183
Mortgage-backed or related securities
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	930,566	1,307,411
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(90,537)	(38,028)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,159,110	721,454
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(276,184)	(11,933)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	2,089,676	2,028,865
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	366,721	49,961
Asset-backed securities
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	201,437	3,382
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(10,993)	(9)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Total	201,437	3,382
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	$ 10,993	$ 9

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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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Amount of accumulated unrealized loss on 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 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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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 less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on 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 less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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