INVESTMENT SECURITIES (Schedule of Unrealized Loss on Investments, AFS) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value
Less than 12 months, fair value	$ 141,927	$ 289,705
More than 12 months, fair value	310,127	52,305
Fair value	452,054	342,010
Unrealized Loss
Less than 12 months, unrealized loss	18,096	5,136
More than 12 months, unrealized loss	41,413	893
Unrealized loss	59,509	6,029
Asset-backed securities issued by GSEs and U.S. Agencies
Fair Value
Less than 12 months, fair value	69,403	205,891
More than 12 months, fair value	220,175	41,327
Fair value	289,578	247,218
Unrealized Loss
Less than 12 months, unrealized loss	6,302	3,997
More than 12 months, unrealized loss	26,422	776
Unrealized loss	32,724	4,773
Asset-backed securities issued by Others
Fair Value
Less than 12 months, fair value	5,937	0
More than 12 months, fair value	149	57
Fair value	6,086	57
Unrealized Loss
Less than 12 months, unrealized loss	244	0
More than 12 months, unrealized loss	16	4
Unrealized loss	260	4
Student Loan Trust ABSs
Fair Value
Less than 12 months, fair value	6,536	21,640
More than 12 months, fair value	34,823	2,226
Fair value	41,359	23,866
Unrealized Loss
Less than 12 months, unrealized loss	1,000	281
More than 12 months, unrealized loss	879	5
Unrealized loss	1,879	286
Municipal bonds
Fair Value
Less than 12 months, fair value	38,786	47,314
More than 12 months, fair value	40,078	6,696
Fair value	78,864	54,010
Unrealized Loss
Less than 12 months, unrealized loss	8,927	776
More than 12 months, unrealized loss	12,055	108
Unrealized loss	20,982	884
Corporate bonds
Fair Value
Less than 12 months, fair value	2,609
More than 12 months, fair value	0
Fair value	2,609
Unrealized Loss
Less than 12 months, unrealized loss	391
More than 12 months, unrealized loss	0
Unrealized loss	391
U.S. government obligations
Fair Value
Less than 12 months, fair value	18,656	14,860
More than 12 months, fair value	14,902	1,999
Fair value	33,558	16,859
Unrealized Loss
Less than 12 months, unrealized loss	1,232	82
More than 12 months, unrealized loss	2,041	0
Unrealized loss	$ 3,273	$ 82

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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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