INVESTMENT SECURITIES (Schedule of Unrealized Loss on Investments, AFS) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value
Less than 12 months, fair value	$ 233,381	$ 289,705
More than 12 months, fair value	241,863	52,305
Fair value	475,244	342,010
Unrealized Loss
Less than 12 months, unrealized loss	24,535	5,136
More than 12 months, unrealized loss	18,625	893
Unrealized loss	43,160	6,029
Asset-backed securities issued by GSEs and U.S. Agencies
Fair Value
Less than 12 months, fair value	147,515	205,891
More than 12 months, fair value	157,883	41,327
Fair value	305,398	247,218
Unrealized Loss
Less than 12 months, unrealized loss	12,749	3,997
More than 12 months, unrealized loss	10,672	776
Unrealized loss	23,421	4,773
Asset-backed securities issued by Others
Fair Value
Less than 12 months, fair value	0	0
More than 12 months, fair value	164	57
Fair value	164	57
Unrealized Loss
Less than 12 months, unrealized loss	0	0
More than 12 months, unrealized loss	16	4
Unrealized loss	16	4
Student Loan Trust ABSs
Fair Value
Less than 12 months, fair value	11,633	21,640
More than 12 months, fair value	37,072	2,226
Fair value	48,705	23,866
Unrealized Loss
Less than 12 months, unrealized loss	1,026	281
More than 12 months, unrealized loss	1,057	5
Unrealized loss	2,083	286
Municipal bonds
Fair Value
Less than 12 months, fair value	52,238	47,314
More than 12 months, fair value	31,214	6,696
Fair value	83,452	54,010
Unrealized Loss
Less than 12 months, unrealized loss	9,881	776
More than 12 months, unrealized loss	5,478	108
Unrealized loss	15,359	884
Corporate bonds
Fair Value
Less than 12 months, fair value	2,857
More than 12 months, fair value	0
Fair value	2,857
Unrealized Loss
Less than 12 months, unrealized loss	143
More than 12 months, unrealized loss	0
Unrealized loss	143
U.S. government obligations
Fair Value
Less than 12 months, fair value	19,138	14,860
More than 12 months, fair value	15,530	1,999
Fair value	34,668	16,859
Unrealized Loss
Less than 12 months, unrealized loss	736	82
More than 12 months, unrealized loss	1,402	0
Unrealized loss	$ 2,138	$ 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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