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Securities (Unrealized Loss NOT deemed to be OTTI) (Details) $ in Thousands | Mar. 31, 2019 USD ($) holding | Dec. 31, 2018 USD ($) holding
--- | --- | ---
Summary of gross unrealized losses and fair value of investments |  |
No of holdings | holding | 162 | 205
Fair value, less than 12 months | $ 5,796 | $ 202,901
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months | (11) | (2,486)
Fair value, 12 months or longer | 614,499 | 566,107
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months | (9,492) | (16,926)
Fair value, Total | 620,295 | 769,008
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss | $ (9,503) | $ (19,412)
U. S. Government Agency Securities [Member] |  |
Summary of gross unrealized losses and fair value of investments |  |
No of holdings | holding | 3 | 3
Fair value, less than 12 months | $ 4,306 | $ 9,960
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months | (1) | (43)
Fair value, 12 months or longer | 22,428 | 22,078
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months | (46) | (396)
Fair value, Total | 26,734 | 32,038
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss | $ (47) | $ (439)
Agency mortgage-backed securities |  |
Summary of gross unrealized losses and fair value of investments |  |
No of holdings | holding | 110 | 144
Fair value, less than 12 months | $ 0 | $ 104,616
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months |  | (1,363)
Fair value, 12 months or longer | 246,113 | 222,850
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months | (1,997) | (5,147)
Fair value, Total | 246,113 | 327,466
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss | $ (1,997) | $ (6,510)
Agency Collateralized Mortgage Obligations [Member] |  |
Summary of gross unrealized losses and fair value of investments |  |
No of holdings | holding | 41 | 48
Fair value, less than 12 months | $ 0 | $ 57,871
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months | 0 | (398)
Fair value, 12 months or longer | 285,297 | 279,229
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months | (6,139) | (9,957)
Fair value, Total | 285,297 | 337,100
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss | $ (6,139) | $ (10,355)
Single issuer trust preferred securities issued by banks and insurers |  |
Summary of gross unrealized losses and fair value of investments |  |
No of holdings | holding | 1 | 2
Fair value, less than 12 months | $ 1,490 | $ 2,197
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months | (10) | (20)
Fair value, 12 months or longer | 0 | 0
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months | 0 | 0
Fair value, Total | 1,490 | 2,197
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss | $ (10) | $ (20)
Pooled trust preferred securities issued by banks and insurers |  |
Summary of gross unrealized losses and fair value of investments |  |
No of holdings | holding | 1 | 1
Fair value, less than 12 months | $ 0 | $ 0
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months | 0 | 0
Fair value, 12 months or longer | 1,314 | 1,329
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months | (346) | (349)
Fair value, Total | 1,314 | 1,329
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss | $ (346) | $ (349)
Small Business Administration Pooled Securities [Member] |  |
Summary of gross unrealized losses and fair value of investments |  |
No of holdings | holding | 6 | 7
Fair value, less than 12 months | $ 0 | $ 28,257
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for less than 12 months | 0 | (662)
Fair value, 12 months or longer | 59,347 | 40,621
Unrealized loss position for available for sale and held to maturity securities in a continuous loss position for more than 12 months | (964) | (1,077)
Fair value, Total | 59,347 | 68,878
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Loss | $ (964) | $ (1,739)

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