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Securities - Gross Unrealized Losses and Fair Value by Investment Category (Details) $ in Thousands | Jun. 30, 2020 USD ($) security | Dec. 31, 2019 USD ($) security
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Available for Sale: |  |
Number of positions, Less than 12 Months | security | 43 | 79
Fair Value, Less than 12 Months | $ 69,738 | $ 331,023
Unrealized Losses, Less than 12 Months | $ (1,097) | $ (2,394)
Number of positions, 12 Months or More | security | 4 | 22
Fair value, 12 Months or More | $ 8,841 | $ 33,700
Unrealized Losses, 12 Months or More | $ (4,390) | $ (2,484)
Number of positions | security | 47 | 101
Fair Value | $ 78,579 | $ 364,723
Unrealized Losses | $ (5,487) | $ (4,878)
Obligations of other U.S. Government agencies and corporations |  |
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 |  | 1
Fair value, 12 Months or More |  | $ 1,008
Unrealized Losses, 12 Months or More |  | $ (3)
Number of positions | security |  | 1
Fair Value |  | $ 1,008
Unrealized Losses |  | $ (3)
Obligations of states and political subdivisions |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 24 | 26
Fair Value, Less than 12 Months | $ 40,387 | $ 33,902
Unrealized Losses, Less than 12 Months | $ (817) | $ (365)
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 | 24 | 26
Fair Value | $ 40,387 | $ 33,902
Unrealized Losses | $ (817) | $ (365)
Trust preferred securities |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 0 | 0
Fair Value, Less than 12 Months | $ 0 | $ 0
Unrealized Losses, Less than 12 Months | $ 0 | $ 0
Number of positions, 12 Months or More | security | 2 | 2
Fair value, 12 Months or More | $ 7,679 | $ 9,986
Unrealized Losses, 12 Months or More | $ (4,389) | $ (2,167)
Number of positions | security | 2 | 2
Fair Value | $ 7,679 | $ 9,986
Unrealized Losses | $ (4,389) | $ (2,167)
Other debt securities |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 12 | 3
Fair Value, Less than 12 Months | $ 9,899 | $ 8,737
Unrealized Losses, Less than 12 Months | $ (212) | $ (131)
Number of positions, 12 Months or More | security | 0 | 1
Fair value, 12 Months or More | $ 0 | $ 741
Unrealized Losses, 12 Months or More | $ 0 | $ (1)
Number of positions | security | 12 | 4
Fair Value | $ 9,899 | $ 9,478
Unrealized Losses | $ (212) | $ (132)
Government agency mortgage backed securities | Residential mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 2 | 37
Fair Value, Less than 12 Months | $ 828 | $ 233,179
Unrealized Losses, Less than 12 Months | $ (1) | $ (1,504)
Number of positions, 12 Months or More | security | 0 | 16
Fair value, 12 Months or More | $ 0 | $ 20,775
Unrealized Losses, 12 Months or More | $ 0 | $ (312)
Number of positions | security | 2 | 53
Fair Value | $ 828 | $ 253,954
Unrealized Losses | $ (1) | $ (1,816)
Government agency mortgage backed securities | Commercial mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 0 | 1
Fair Value, Less than 12 Months | $ 0 | $ 4,976
Unrealized Losses, Less than 12 Months | $ 0 | $ (23)
Number of positions, 12 Months or More | security | 2 | 2
Fair value, 12 Months or More | $ 1,162 | $ 1,190
Unrealized Losses, 12 Months or More | $ (1) | $ (1)
Number of positions | security | 2 | 3
Fair Value | $ 1,162 | $ 6,166
Unrealized Losses | $ (1) | $ (24)
Government agency collateralized mortgage obligations | Residential mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 4 | 11
Fair Value, Less than 12 Months | $ 13,916 | $ 45,319
Unrealized Losses, Less than 12 Months | $ (27) | $ (262)
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 | 4 | 11
Fair Value | $ 13,916 | $ 45,319
Unrealized Losses | $ (27) | $ (262)
Government agency collateralized mortgage obligations | Commercial mortgage backed securities: |  |
Available for Sale: |  |
Number of positions, Less than 12 Months | security | 1 | 1
Fair Value, Less than 12 Months | $ 4,708 | $ 4,910
Unrealized Losses, Less than 12 Months | $ (40) | $ (109)
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 | 1 | 1
Fair Value | $ 4,708 | $ 4,910
Unrealized Losses | $ (40) | $ (109)

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