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Securities (Schedule of Information Regarding Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 | Dec. 31, 2016
Total temporarily impaired securities Fair Value | $ 139,925 | $ 232,817
Total temporarily impaired securities Unrealized Losses | 879 | 4,138
Total temporarily impaired securities Fair Value | 17,844 | 19,943
Total temporarily impaired securities Unrealized Losses | 442 | 622
Total temporarily impaired securities Fair Value | 157,769 | 252,760
Total temporarily impaired securities Unrealized Losses | 1,321 | 4,760
Government-sponsored enterprise securities [Member] |  |
AFS Fair Value | 7,991 | 7,990
AFS Unrealized Losses | 7 | 7
AFS Fair Value |  |
AFS Unrealized Losses |  |
Total AFS Fair Value | 7,991 | 7,990
Total AFS Unrealized Losses | 7 | 7
Mortgage-backed securities [Member] |  |
AFS Fair Value | 131,117 | 196,999
AFS Unrealized Losses | 865 | 3,841
AFS Fair Value | 16,909 | 19,001
AFS Unrealized Losses | 377 | 552
Total AFS Fair Value | 148,026 | 216,000
Total AFS Unrealized Losses | 1,242 | 4,393
Corporate bonds [Member] |  |
AFS Fair Value |  | 27,027
AFS Unrealized Losses |  | 259
AFS Fair Value | 935 | 935
AFS Unrealized Losses | 65 | 65
Total AFS Fair Value | 935 | 27,962
Total AFS Unrealized Losses | 65 | 324
Equity securities [Member] |  |
AFS Fair Value |  |
AFS Unrealized Losses |  |
AFS Fair Value |  | 7
AFS Unrealized Losses |  | 5
Total AFS Fair Value |  | 7
Total AFS Unrealized Losses |  | 5
State and local governments [Member] |  |
AFS Fair Value | 817 | 801
AFS Unrealized Losses | 7 | 31
AFS Fair Value |  |
AFS Unrealized Losses |  |
Total AFS Fair Value | 817 | 801
Total AFS Unrealized Losses | $ 7 | $ 31

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