INVESTMENT SECURITIES (Investment Securities at an Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
INVESTMENT SECURITIES
Less than 12 months, Fair Value	$ 376,955	$ 1,036,979
Less than 12 months, Unrealized Losses	(56,931)	(17,990)
12 months or longer, Fair Value	300,715	175,681
12 months or longer, Unrealized Losses	(76,350)	(6,743)
Total, Fair Value	677,670	1,212,660
Total, Unrealized Losses	(133,281)	(24,733)
States and political subdivisions
INVESTMENT SECURITIES
Less than 12 months, Fair Value	102,107	79,360
Less than 12 months, Unrealized Losses	(22,280)	(1,252)
12 months or longer, Fair Value	33,382	10,864
12 months or longer, Unrealized Losses	(14,388)	(597)
Total, Fair Value	135,489	90,224
Total, Unrealized Losses	(36,668)	(1,849)
Corporate securities
INVESTMENT SECURITIES
Less than 12 months, Fair Value	4,257	8,633
Less than 12 months, Unrealized Losses	(762)	(235)
12 months or longer, Fair Value	25,241	21,960
12 months or longer, Unrealized Losses	(6,064)	(830)
Total, Fair Value	29,498	30,593
Total, Unrealized Losses	(6,826)	(1,065)
U.S. Treasury obligations and direct obligations of U.S. Government agencies
INVESTMENT SECURITIES
Less than 12 months, Fair Value	6,448	16,103
Less than 12 months, Unrealized Losses	(93)	(415)
12 months or longer, Fair Value	16,037	10,891
12 months or longer, Unrealized Losses	(2,080)	(153)
Total, Fair Value	22,485	26,994
Total, Unrealized Losses	(2,173)	(568)
Residential - U.S. Government-sponsored entities
INVESTMENT SECURITIES
Less than 12 months, Fair Value	224,937	926,570
Less than 12 months, Unrealized Losses	(30,730)	(15,883)
12 months or longer, Fair Value	207,348	114,747
12 months or longer, Unrealized Losses	(48,156)	(4,110)
Total, Fair Value	432,285	1,041,317
Total, Unrealized Losses	(78,886)	(19,993)
Residential - Non-government agencies
INVESTMENT SECURITIES
Less than 12 months, Fair Value	8,198	0
Less than 12 months, Unrealized Losses	(906)	0
12 months or longer, Fair Value	735	938
12 months or longer, Unrealized Losses	(249)	(64)
Total, Fair Value	8,933	938
Total, Unrealized Losses	(1,155)	(64)
Commercial - U.S. Government-sponsored entities
INVESTMENT SECURITIES
Less than 12 months, Fair Value	29,489	6,313
Less than 12 months, Unrealized Losses	(2,137)	(205)
12 months or longer, Fair Value	17,972	16,281
12 months or longer, Unrealized Losses	(5,413)	(989)
Total, Fair Value	47,461	22,594
Total, Unrealized Losses	(7,550)	$ (1,194)
Commercial - Non-government agencies
INVESTMENT SECURITIES
Less than 12 months, Fair Value	1,519
Less than 12 months, Unrealized Losses	(23)
12 months or longer, Fair Value	0
12 months or longer, Unrealized Losses	0
Total, Fair Value	1,519
Total, Unrealized Losses	$ (23)

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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