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Securities - Gross Unrealized Losses and Fair Value by Investment Category (Details) $ in Thousands | Jun. 30, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
--- | --- | ---
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 295 | 121
Fair Value, Less than 12 Months | $ 2,096,955 | $ 1,899,384
Unrealized Losses, Less than 12 Months | $ (185,483) | $ (30,120)
Number of positions, 12 Months or More | security | 33 | 7
Fair value, 12 Months or More | $ 292,496 | $ 25,634
Unrealized Losses, 12 Months or More | $ (41,704) | $ (904)
Number of positions | security | 328 | 128
Fair Value | $ 2,389,451 | $ 1,925,018
Unrealized Losses | $ (227,187) | $ (31,024)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 196 | 90
Fair Value, Less than 12 Months | $ 384,047 | $ 201,791
Unrealized Losses, Less than 12 Months | $ (59,122) | $ (1,154)
Number of positions, 12 Months or More | security | 6 | 1
Fair Value, 12 Months or More | $ 31,876 | $ 5,354
Unrealized Losses, 12 Months or More | $ (5,188) | $ (17)
Number of positions | security | 202 | 91
Fair Value | $ 415,923 | $ 207,145
Unrealized Losses | $ (64,310) | $ (1,171)
Obligations of other U.S. Government agencies and corporations |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 3 |
Fair Value, Less than 12 Months | $ 119,357 |
Unrealized Losses, Less than 12 Months | $ (643) |
Number of positions, 12 Months or More | security | 0 |
Fair value, 12 Months or More | $ 0 |
Unrealized Losses, 12 Months or More | $ 0 |
Number of positions | security | 3 |
Fair Value | $ 119,357 |
Unrealized Losses | $ (643) |
Obligations of states and political subdivisions |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 60 | 8
Fair Value, Less than 12 Months | $ 98,281 | $ 34,303
Unrealized Losses, Less than 12 Months | $ (8,807) | $ (216)
Number of positions, 12 Months or More | security | 4 | 3
Fair value, 12 Months or More | $ 5,615 | $ 3,892
Unrealized Losses, 12 Months or More | $ (583) | $ (53)
Number of positions | security | 64 | 11
Fair Value | $ 103,896 | $ 38,195
Unrealized Losses | $ (9,390) | $ (269)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 127 | 24
Fair Value, Less than 12 Months | $ 241,365 | $ 62,131
Unrealized Losses, Less than 12 Months | $ (46,316) | $ (685)
Number of positions, 12 Months or More | security | 1 | 0
Fair Value, 12 Months or More | $ 1,482 | $ 0
Unrealized Losses, 12 Months or More | $ (401) | $ 0
Number of positions | security | 128 | 24
Fair Value | $ 242,847 | $ 62,131
Unrealized Losses | $ (46,717) | $ (685)
Trust preferred securities |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security |  | 0
Fair Value, Less than 12 Months |  | $ 0
Unrealized Losses, Less than 12 Months |  | $ 0
Number of positions, 12 Months or More | security |  | 0
Fair value, 12 Months or More |  | $ 0
Unrealized Losses, 12 Months or More |  | $ 0
Number of positions | security |  | 0
Fair Value |  | $ 0
Unrealized Losses |  | $ 0
Other debt securities |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 23 | 1
Fair Value, Less than 12 Months | $ 114,580 | $ 8,699
Unrealized Losses, Less than 12 Months | $ (4,198) | $ (148)
Number of positions, 12 Months or More | security | 0 | 0
Fair value, 12 Months or More | $ 0 | $ 0
Unrealized Losses, 12 Months or More | $ 0 | $ 0
Number of positions | security | 23 | 1
Fair Value | $ 114,580 | $ 8,699
Unrealized Losses | $ (4,198) | $ (148)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 8 | 8
Fair Value, Less than 12 Months | $ 18,399 | $ 21,972
Unrealized Losses, Less than 12 Months | $ (1,589) | $ (79)
Number of positions, 12 Months or More | security | 0 | 0
Fair Value, 12 Months or More | $ 0 | $ 0
Unrealized Losses, 12 Months or More | $ 0 | $ 0
Number of positions | security | 8 | 8
Fair Value | $ 18,399 | $ 21,972
Unrealized Losses | $ (1,589) | $ (79)
Government agency mortgage backed securities | Residential mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 121 | 41
Fair Value, Less than 12 Months | $ 798,188 | $ 727,546
Unrealized Losses, Less than 12 Months | $ (64,728) | $ (6,312)
Number of positions, 12 Months or More | security | 10 | 1
Fair value, 12 Months or More | $ 79,131 | $ 12,305
Unrealized Losses, 12 Months or More | $ (9,509) | $ (504)
Number of positions | security | 131 | 42
Fair Value | $ 877,319 | $ 739,851
Unrealized Losses | $ (74,237) | $ (6,816)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 53 | 50
Fair Value, Less than 12 Months | $ 77,033 | $ 53,560
Unrealized Losses, Less than 12 Months | $ (5,634) | $ (181)
Number of positions, 12 Months or More | security | 3 | 1
Fair Value, 12 Months or More | $ 6,365 | $ 5,354
Unrealized Losses, 12 Months or More | $ (910) | $ (17)
Number of positions | security | 56 | 51
Fair Value | $ 83,398 | $ 58,914
Unrealized Losses | $ (6,544) | $ (198)
Government agency mortgage backed securities | Commercial mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 3 | 1
Fair Value, Less than 12 Months | $ 10,255 | $ 1,791
Unrealized Losses, Less than 12 Months | $ (568) | $ (1)
Number of positions, 12 Months or More | security | 0 | 1
Fair value, 12 Months or More | $ 0 | $ 432
Unrealized Losses, 12 Months or More | $ 0 | $ 0
Number of positions | security | 3 | 2
Fair Value | $ 10,255 | $ 2,223
Unrealized Losses | $ (568) | $ (1)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 1 |
Fair Value, Less than 12 Months | $ 14,741 |
Unrealized Losses, Less than 12 Months | $ (2,276) |
Number of positions, 12 Months or More | security | 0 |
Fair Value, 12 Months or More | $ 0 |
Unrealized Losses, 12 Months or More | $ 0 |
Number of positions | security | 1 |
Fair Value | $ 14,741 |
Unrealized Losses | $ (2,276) |
Government agency collateralized mortgage obligations | Residential mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 56 | 49
Fair Value, Less than 12 Months | $ 811,824 | $ 966,126
Unrealized Losses, Less than 12 Months | $ (94,500) | $ (20,371)
Number of positions, 12 Months or More | security | 11 | 0
Fair value, 12 Months or More | $ 167,946 | $ 0
Unrealized Losses, 12 Months or More | $ (25,429) | $ 0
Number of positions | security | 67 | 49
Fair Value | $ 979,770 | $ 966,126
Unrealized Losses | $ (119,929) | $ (20,371)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 0 | 1
Fair Value, Less than 12 Months | $ 0 | $ 24,740
Unrealized Losses, Less than 12 Months | $ 0 | $ (92)
Number of positions, 12 Months or More | security | 1 | 0
Fair Value, 12 Months or More | $ 18,985 | $ 0
Unrealized Losses, 12 Months or More | $ (3,375) | $ 0
Number of positions | security | 1 | 1
Fair Value | $ 18,985 | $ 24,740
Unrealized Losses | $ (3,375) | $ (92)
Government agency collateralized mortgage obligations | Commercial mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 29 | 21
Fair Value, Less than 12 Months | $ 144,470 | $ 160,919
Unrealized Losses, Less than 12 Months | $ (12,039) | $ (3,072)
Number of positions, 12 Months or More | security | 8 | 2
Fair value, 12 Months or More | $ 39,804 | $ 9,005
Unrealized Losses, 12 Months or More | $ (6,183) | $ (347)
Number of positions | security | 37 | 23
Fair Value | $ 184,274 | $ 169,924
Unrealized Losses | $ (18,222) | $ (3,419)
Held to Maturity: |  |
Number of positions, Less than 12 Months | security | 7 | 7
Fair Value, Less than 12 Months | $ 32,509 | $ 39,388
Unrealized Losses, Less than 12 Months | $ (3,307) | $ (117)
Number of positions, 12 Months or More | security | 1 | 0
Fair Value, 12 Months or More | $ 5,044 | $ 0
Unrealized Losses, 12 Months or More | $ (502) | $ 0
Number of positions | security | 8 | 7
Fair Value | $ 37,553 | $ 39,388
Unrealized Losses | $ (3,809) | $ (117)

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