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
Mar. 31, 2024
Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 2,556,327 $ 2,372,737
Other comprehensive (loss) income: (30,949) 56,353
Ending balance 2,548,928 2,440,236
Unrealized Gains (Losses) on AFS Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (302,532) (363,919)
Other comprehensive loss before reclassification (20,501) 32,068
Amounts reclassified from AOCI into earnings (2) 10,586
Other comprehensive (loss) income: (20,503) 42,654
Ending balance (323,035) (321,265)
Unrealized Gains (Losses) for AFS Securities Transferred to HTM    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 6 17
Other comprehensive loss before reclassification 0 0
Amounts reclassified from AOCI into earnings (2) (3)
Other comprehensive (loss) income: (2) (3)
Ending balance 4 14
Change in Fair Value of Cash Flow Hedge    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (42,165) (54,610)
Other comprehensive loss before reclassification (10,253) 13,714
Amounts reclassified from AOCI into earnings 0 0
Other comprehensive (loss) income: (10,253) 13,714
Ending balance (52,418) (40,896)
Unrealized Gains (Losses) on BOLI    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 1,342 226
Other comprehensive loss before reclassification (16) 10
Amounts reclassified from AOCI into earnings (175) (22)
Other comprehensive (loss) income: (191) (12)
Ending balance 1,151 214
AOCI Attributable to Parent    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (343,349) (418,286)
Other comprehensive loss before reclassification (30,770) 45,792
Amounts reclassified from AOCI into earnings (179) 10,561
Other comprehensive (loss) income: (30,949) 56,353
Ending balance $ (374,298) $ (361,933)