XML 44 R33.htm IDEA: XBRL DOCUMENT v3.21.1
Securities, Securities in Continuous Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Securities [Abstract]    
Percentage of total investment with unrealized losses 53.20% 16.20%
Available-for-sale, amortized cost [Abstract]    
Less than 12 months $ 585,705 $ 87,261
12 months or more 38,448 75,247
Total 624,153 162,508
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (9,593) (375)
12 months or more (188) (411)
Total (9,781) (786)
Available-for-sale, fair value [Abstract]    
Less than 12 months 576,112 86,886
12 months or more 38,260 74,836
Total 614,372 161,722
U.S. Treasury and Government Agencies [Member]    
Available-for-sale, amortized cost [Abstract]    
Less than 12 months 136,625 5,604
12 months or more 28,763 46,163
Total 165,388 51,767
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (2,028) (7)
12 months or more (127) (190)
Total (2,155) (197)
Available-for-sale, fair value [Abstract]    
Less than 12 months 134,597 5,597
12 months or more 28,636 45,973
Total 163,233 51,570
State and Political Subdivisions [Member]    
Available-for-sale, amortized cost [Abstract]    
Less than 12 months 101,944 534
12 months or more 533 0
Total 102,477 534
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (4,660) (3)
12 months or more (28) 0
Total (4,688) (3)
Available-for-sale, fair value [Abstract]    
Less than 12 months 97,284 531
12 months or more 505 0
Total 97,789 531
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]    
Available-for-sale, amortized cost [Abstract]    
Less than 12 months 347,136 58,463
12 months or more 2,614 2,801
Total 349,750 61,264
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months (2,905) (336)
12 months or more (13) (42)
Total (2,918) (378)
Available-for-sale, fair value [Abstract]    
Less than 12 months 344,231 58,127
12 months or more 2,601 2,759
Total 346,832 60,886
Other Debt Securities [Member]    
Available-for-sale, amortized cost [Abstract]    
Less than 12 months 0 22,660
12 months or more 6,538 26,283
Total 6,538 48,943
Available-for-sale, gross unrealized losses [Abstract]    
Less than 12 months 0 (29)
12 months or more (20) (179)
Total (20) (208)
Available-for-sale, fair value [Abstract]    
Less than 12 months 0 22,631
12 months or more 6,518 26,104
Total $ 6,518 $ 48,735