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Securities, HTM Securities in Continuous Unrealized Loss Position (Details) $ in Thousands | Mar. 31, 2019 USD ($) Position | Dec. 31, 2018 USD ($) Position
--- | --- | ---
Unrealized Loss Position, Fair Value [Abstract] |  |
Less than 12 months | $ 0 | $ 23,293
12 months or longer | 226,992 | 286,233
Total | 226,992 | 309,526
Unrealized Loss Position, Unrealized Losses [Abstract] |  |
Less than 12 months | 0 | (91)
12 months or longer | (3,571) | (8,195)
Total | $ (3,571) | $ (8,286)
Unrealized Loss Position, Number of Positions [Abstract] |  |
Less than 12 months | Position | 0 | 32
12 months or longer | Position | 60 | 118
Total | Position | 60 | 150
Mortgage-Backed [Member] |  |
Unrealized Loss Position, Fair Value [Abstract] |  |
Less than 12 months | $ 0 | $ 0
12 months or longer | 82,204 | 82,579
Total | 82,204 | 82,579
Unrealized Loss Position, Unrealized Losses [Abstract] |  |
Less than 12 months | 0 | 0
12 months or longer | (981) | (2,773)
Total | $ (981) | $ (2,773)
Unrealized Loss Position, Number of Positions [Abstract] |  |
Less than 12 months | Position | 0 | 0
12 months or longer | Position | 6 | 6
Total | Position | 6 | 6
Collateralized Mortgage Obligations [Member] |  |
Unrealized Loss Position, Fair Value [Abstract] |  |
Less than 12 months | $ 0 | $ 4,386
12 months or longer | 125,486 | 145,396
Total | 125,486 | 149,782
Unrealized Loss Position, Unrealized Losses [Abstract] |  |
Less than 12 months | 0 | (7)
12 months or longer | (2,230) | (3,890)
Total | $ (2,230) | $ (3,897)
Unrealized Loss Position, Number of Positions [Abstract] |  |
Less than 12 months | Position | 0 | 2
12 months or longer | Position | 24 | 26
Total | Position | 24 | 28
State & Municipal [Member] |  |
Unrealized Loss Position, Fair Value [Abstract] |  |
Less than 12 months | $ 0 | $ 18,907
12 months or longer | 19,302 | 58,258
Total | 19,302 | 77,165
Unrealized Loss Position, Unrealized Losses [Abstract] |  |
Less than 12 months | 0 | (84)
12 months or longer | (360) | (1,532)
Total | $ (360) | $ (1,616)
Unrealized Loss Position, Number of Positions [Abstract] |  |
Less than 12 months | Position | 0 | 30
12 months or longer | Position | 30 | 86
Total | Position | 30 | 116

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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