XML 60 R49.htm IDEA: XBRL DOCUMENT v3.23.3
Investment Securities - Gross Unrealized Losses on Debt Securities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Debt Securities Available for Sale    
Less than 12 months, Fair Value $ 91,604 $ 1,185,676
Less than 12 months, Unrealized Loss (3,924) (97,101)
12 months or more, Fair Value 2,017,453 1,218,843
12 months or more, Unrealized Loss (331,777) (193,869)
Total, Fair Value 2,109,057 2,404,519
Total, Unrealized Loss (335,701) (290,970)
Debt Securities Held to Maturity    
Less than 12 months, Fair Value 1,780 148,107
Less than 12 Months, Unrealized Loss (61) (11,060)
12 months or more, Fair Value 122,278 0
12 months or more, Unrealized Loss (14,939) 0
Total, Fair Value 124,058 148,107
Total, Unrealized Loss (15,000) (11,060)
Obligations of U.S. government agencies    
Debt Securities Available for Sale    
Less than 12 months, Fair Value 413 605,615
Less than 12 months, Unrealized Loss (14) (61,408)
12 months or more, Fair Value 1,206,736 766,612
12 months or more, Unrealized Loss (235,852) (134,234)
Total, Fair Value 1,207,149 1,372,227
Total, Unrealized Loss (235,866) (195,642)
Debt Securities Held to Maturity    
Less than 12 months, Fair Value 233 143,577
Less than 12 Months, Unrealized Loss (2) (11,013)
12 months or more, Fair Value 121,340 0
12 months or more, Unrealized Loss (14,822) 0
Total, Fair Value 121,573 143,577
Total, Unrealized Loss (14,824) (11,013)
Obligations of states and political subdivisions    
Debt Securities Available for Sale    
Less than 12 months, Fair Value 46,600 219,532
Less than 12 months, Unrealized Loss (2,674) (26,904)
12 months or more, Fair Value 207,415 43,282
12 months or more, Unrealized Loss (45,972) (12,917)
Total, Fair Value 254,015 262,814
Total, Unrealized Loss (48,646) (39,821)
Debt Securities Held to Maturity    
Less than 12 months, Fair Value 1,547 4,530
Less than 12 Months, Unrealized Loss (59) (47)
12 months or more, Fair Value 938 0
12 months or more, Unrealized Loss (117) 0
Total, Fair Value 2,485 4,530
Total, Unrealized Loss (176) (47)
Corporate bonds    
Debt Securities Available for Sale    
Less than 12 months, Fair Value 0 5,751
Less than 12 months, Unrealized Loss 0 (413)
12 months or more, Fair Value 5,505 0
12 months or more, Unrealized Loss (665) 0
Total, Fair Value 5,505 5,751
Total, Unrealized Loss (665) (413)
Asset backed securities    
Debt Securities Available for Sale    
Less than 12 months, Fair Value 0 231,703
Less than 12 months, Unrealized Loss 0 (4,955)
12 months or more, Fair Value 309,126 205,329
12 months or more, Unrealized Loss (5,730) (10,238)
Total, Fair Value 309,126 437,032
Total, Unrealized Loss (5,730) (15,193)
Non-agency collateralized mortgage obligations    
Debt Securities Available for Sale    
Less than 12 months, Fair Value 44,591 123,075
Less than 12 months, Unrealized Loss (1,236) (3,421)
12 months or more, Fair Value 288,671 203,620
12 months or more, Unrealized Loss (43,558) (36,480)
Total, Fair Value 333,262 326,695
Total, Unrealized Loss $ (44,794) $ (39,901)