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, 2022
Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 2,710,071 $ 2,708,490
Other comprehensive income (loss) (210,118) (34,514)
Ending balance 2,498,335 2,709,732
Unrealized Gains (Losses) on AFS Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 22,763 74,161
Other comprehensive income (loss) before reclassification (186,967) (33,125)
Amounts reclassified from AOCI into earnings 0 (62)
Other comprehensive income (loss) (186,967) (33,187)
Ending balance (164,204) 40,974
Unrealized Gains (Losses) for AFS Securities Transferred to HTM    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 35 55
Other comprehensive income (loss) before reclassification 0 0
Amounts reclassified from AOCI into earnings (5) (5)
Other comprehensive income (loss) (5) (5)
Ending balance 30 50
Change in Fair Value of Cash Flow Hedge    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (1,567) 0
Other comprehensive income (loss) before reclassification (23,313) (1,428)
Amounts reclassified from AOCI into earnings 0 (47)
Other comprehensive income (loss) (23,313) (1,475)
Ending balance (24,880) (1,475)
Unrealized Gains (Losses) on BOLI    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (2,596) (3,201)
Other comprehensive income (loss) before reclassification 0 0
Amounts reclassified from AOCI into earnings 167 153
Other comprehensive income (loss) 167 153
Ending balance (2,429) (3,048)
AOCI Attributable to Parent    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 18,635 71,015
Other comprehensive income (loss) before reclassification (210,280) (34,553)
Amounts reclassified from AOCI into earnings 162 39
Other comprehensive income (loss) (210,118) (34,514)
Ending balance $ (191,483) $ 36,501