Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Change in Accumulated Other Comprehensive Income) (Details)

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STOCKHOLDERS' EQUITY (Change in Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2022
Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]                
Beginning balance $ 2,391,476 $ 2,498,335 $ 2,710,071 $ 2,747,597 $ 2,709,732 $ 2,708,490 $ 2,710,071 $ 2,708,490
Other comprehensive (loss) income (145,836) (124,800) (210,118) (23,649) 16,571 (34,514) (480,754) (41,592)
Ending balance 2,281,150 2,391,476 2,498,335 2,694,439 2,747,597 2,709,732 2,281,150 2,694,439
Unrealized Gains (Losses) on AFS Securities                
AOCI Attributable to Parent, Net of Tax [Roll Forward]                
Beginning balance (277,577)   22,763 54,792   74,161 22,763 74,161
Other comprehensive income (loss) before reclassification (121,841)     (23,242)     (422,183) (42,549)
Amounts reclassified from AOCI into earnings 0     (7)     2 (69)
Other comprehensive (loss) income (121,841)     (23,249)     (422,181) (42,618)
Ending balance (399,418) (277,577)   31,543 54,792   (399,418) 31,543
Unrealized Gains (Losses) for AFS Securities Transferred to HTM                
AOCI Attributable to Parent, Net of Tax [Roll Forward]                
Beginning balance 25   35 45   55 35 55
Other comprehensive income (loss) before reclassification 0     0     0 0
Amounts reclassified from AOCI into earnings (4)     (5)     (14) (15)
Other comprehensive (loss) income (4)     (5)     (14) (15)
Ending balance 21 25   40 45   21 40
Change in Fair Value of Cash Flow Hedge                
AOCI Attributable to Parent, Net of Tax [Roll Forward]                
Beginning balance (36,452)   (1,567) 1,132   0 (1,567) 0
Other comprehensive income (loss) before reclassification (24,142)     (545)     (59,027) 634
Amounts reclassified from AOCI into earnings 0     0     0 (47)
Other comprehensive (loss) income (24,142)     (545)     (59,027) 587
Ending balance (60,594) (36,452)   587 1,132   (60,594) 587
Unrealized Gains (Losses) on BOLI                
AOCI Attributable to Parent, Net of Tax [Roll Forward]                
Beginning balance (2,279)   (2,596) (2,897)   (3,201) (2,596) (3,201)
Other comprehensive income (loss) before reclassification 0     0     0 0
Amounts reclassified from AOCI into earnings 151     150     468 454
Other comprehensive (loss) income 151     150     468 454
Ending balance (2,128) (2,279)   (2,747) (2,897)   (2,128) (2,747)
AOCI Attributable to Parent                
AOCI Attributable to Parent, Net of Tax [Roll Forward]                
Beginning balance (316,283) (191,483) 18,635 53,072 36,501 71,015 18,635 71,015
Other comprehensive income (loss) before reclassification (145,983)     (23,787)     (481,210) (41,915)
Amounts reclassified from AOCI into earnings 147     138     456 323
Other comprehensive (loss) income (145,836) (124,800) (210,118) (23,649) 16,571 (34,514) (480,754) (41,592)
Ending balance $ (462,119) $ (316,283) $ (191,483) $ 29,423 $ 53,072 $ 36,501 $ (462,119) $ 29,423