XML 55 R45.htm IDEA: XBRL DOCUMENT v3.23.1
Securities - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]    
12 Months or less, Fair Value $ 166,565 $ 302,275
12 Months or less, Unrealized Loss (3,483) (18,609)
More than 12 months, Fair Value 329,437 238,156
More than 12 months, Unrealized Loss (55,113) (49,159)
Total Fair Value 496,002 540,431
Total Unrealized Loss (58,596) (67,768)
U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member]    
Schedule of Available-for-sale Securities [Line Items]    
12 Months or less, Fair Value 20,129 21,042
12 Months or less, Unrealized Loss (482) (880)
More than 12 months, Fair Value 41,506 39,567
More than 12 months, Unrealized Loss (3,808) (4,606)
Total Fair Value 61,635 60,609
Total Unrealized Loss (4,290) (5,486)
Obligations of States and Political Subdivisions [Member]    
Schedule of Available-for-sale Securities [Line Items]    
12 Months or less, Fair Value 55,169 169,594
12 Months or less, Unrealized Loss (620) (13,016)
More than 12 months, Fair Value 148,004 73,967
More than 12 months, Unrealized Loss (26,894) (20,624)
Total Fair Value 203,173 243,561
Total Unrealized Loss (27,514) (33,640)
Mortgage-backed Securities in Government Sponsored Entities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
12 Months or less, Fair Value 91,267 111,639
12 Months or less, Unrealized Loss (2,381) (4,713)
More than 12 months, Fair Value 139,927 124,622
More than 12 months, Unrealized Loss (24,411) (23,929)
Total Fair Value 231,194 236,261
Total Unrealized Loss $ (26,792) $ (28,642)