Quarterly report [Sections 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 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance $ 5,052,316 $ 5,006,398 $ 3,185,216 $ 3,142,879 $ 5,006,398 $ 3,142,879
Other comprehensive income (loss) 1,695 (22,401) 12,929 25,971 (20,706) 38,900
Ending balance 5,153,414 5,052,316 4,832,639 3,185,216 5,153,414 4,832,639
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance (255,241) (234,702) (301,307) (317,142) (234,702) (317,142)
Other comprehensive income (loss) before reclassification 4,010   6,946   (16,528) 22,702
Amounts reclassified from AOCI into earnings (3)   (12)   (4) 67
Other comprehensive income (loss) 4,007   6,934   (16,532) 22,769
Ending balance (251,234) (255,241) (294,373) (301,307) (251,234) (294,373)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance (23,147) (21,165) (32,742) (43,078) (21,165) (43,078)
Other comprehensive income (loss) before reclassification (2,128)   6,202   (4,110) 16,538
Amounts reclassified from AOCI into earnings 0   0   0 0
Other comprehensive income (loss) (2,128)   6,202   (4,110) 16,538
Ending balance (25,275) (23,147) (26,540) (32,742) (25,275) (26,540)
Unrealized Gains (Losses) on BOLI            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance (100) (220) 334 534 (220) 534
Other comprehensive income (loss) before reclassification 33   0   356 (10)
Amounts reclassified from AOCI into earnings (217)   (207)   (420) (397)
Other comprehensive income (loss) (184)   (207)   (64) (407)
Ending balance (284) (100) 127 334 (284) 127
AOCI Attributable to Parent [Member]            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance (278,488) (256,087) (333,715) (359,686) (256,087) (359,686)
Other comprehensive income (loss) before reclassification 1,915   13,148   (20,282) 39,230
Amounts reclassified from AOCI into earnings (220)   (219)   (424) (330)
Other comprehensive income (loss) 1,695 (22,401) 12,929 25,971 (20,706) 38,900
Ending balance $ (276,793) $ (278,488) $ (320,786) $ (333,715) $ (276,793) $ (320,786)