Quarterly report pursuant to Section 13 or 15(d)

SECURITIES (Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Values of Investment Securities) (Details)

v3.22.2
SECURITIES (Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Values of Investment Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities $ 3,302,775 $ 3,448,784
Gross Unrealized Gains 1,406 65,198
Gross Unrealized (Losses) (352,760) (32,332)
Total AFS securities, Estimated Fair Value 2,951,421 3,481,650
U.S. government and agency securities    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 71,665 73,830
Gross Unrealized Gains 0 179
Gross Unrealized (Losses) (5,925) (160)
Total AFS securities, Estimated Fair Value 65,740 73,849
Obligations of states and political subdivisions    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 964,651 971,126
Gross Unrealized Gains 578 39,343
Gross Unrealized (Losses) (142,802) (2,073)
Total AFS securities, Estimated Fair Value 822,427 1,008,396
Corporate and other bonds    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 184,304 150,201
Gross Unrealized Gains 72 3,353
Gross Unrealized (Losses) (6,484) (178)
Total AFS securities, Estimated Fair Value 177,892 153,376
Commercial    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 430,582 468,893
Gross Unrealized Gains 90 6,900
Gross Unrealized (Losses) (30,837) (4,636)
Total AFS securities, Estimated Fair Value 399,835 471,157
Commercial | Agency    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 326,117 361,806
Gross Unrealized Gains 90 6,761
Gross Unrealized (Losses) (27,246) (4,215)
Total AFS securities, Estimated Fair Value 298,961 364,352
Commercial | Non-agency    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 104,465 107,087
Gross Unrealized Gains 0 139
Gross Unrealized (Losses) (3,591) (421)
Total AFS securities, Estimated Fair Value 100,874 106,805
Residential    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 1,649,924 1,783,094
Gross Unrealized Gains 666 15,423
Gross Unrealized (Losses) (166,712) (25,285)
Total AFS securities, Estimated Fair Value 1,483,878 1,773,232
Residential | Agency    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 1,571,036 1,691,651
Gross Unrealized Gains 665 15,180
Gross Unrealized (Losses) (161,629) (24,337)
Total AFS securities, Estimated Fair Value 1,410,072 1,682,494
Residential | Non-agency    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 78,888 91,443
Gross Unrealized Gains 1 243
Gross Unrealized (Losses) (5,083) (948)
Total AFS securities, Estimated Fair Value 73,806 90,738
Other securities    
Debt Securities, Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Total AFS securities 1,649 1,640
Gross Unrealized Gains 0 0
Gross Unrealized (Losses) 0 0
Total AFS securities, Estimated Fair Value $ 1,649 $ 1,640