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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, 2015 | Dec. 31, 2014
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Total temporarily impaired securities Fair Value | $ 196,149 | $ 75,474
Total temporarily impaired securities Unrealized Losses | 1,627 | 329
Securities in an Unrealized Loss Position for More than 12 Months |  |
Total temporarily impaired securities Fair Value | 33,657 | 37,392
Total temporarily impaired securities Unrealized Losses | 1,125 | 1,299
Total temporarily impaired securities Fair Value | 229,806 | 112,866
Total temporarily impaired securities Unrealized Losses | 2,752 | 1,628
Government-sponsored enterprises securities [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
AFS Fair Value | 13,955 | 5,489
AFS Unrealized Losses | 45 | 11
Securities in an Unrealized Loss Position for More than 12 Months |  |
AFS Fair Value | 2,977 | 2,953
AFS Unrealized Losses | 23 | 47
Total temporarily impaired securities Fair Value | 16,932 | 8,442
Total temporarily impaired securities Unrealized Losses | 68 | 58
Mortgage-backed securities [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
AFS Fair Value | 161,589 | 69,985
AFS Unrealized Losses | 1,102 | 318
Securities in an Unrealized Loss Position for More than 12 Months |  |
AFS Fair Value | 29,740 | 33,557
AFS Unrealized Losses | 1,010 | 1,104
Total temporarily impaired securities Fair Value | 191,329 | 103,542
Total temporarily impaired securities Unrealized Losses | 2,112 | $ 1,422
Corporate bonds [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
AFS Fair Value | 19,773 |
AFS Unrealized Losses | 458 |
Securities in an Unrealized Loss Position for More than 12 Months |  |
AFS Fair Value | 920 | $ 865
AFS Unrealized Losses | 80 | 135
Total temporarily impaired securities Fair Value | 20,693 | 865
Total temporarily impaired securities Unrealized Losses | $ 538 | $ 135
Equity securities [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
AFS Fair Value |  |
AFS Unrealized Losses |  |
Securities in an Unrealized Loss Position for More than 12 Months |  |
AFS Fair Value | $ 20 | $ 17
AFS Unrealized Losses | 12 | 13
Total temporarily impaired securities Fair Value | 20 | 17
Total temporarily impaired securities Unrealized Losses | 12 | $ 13
States and local governments [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
HTM Fair Value | 832 |
HTM Unrealized Losses | $ 22 |
Securities in an Unrealized Loss Position for More than 12 Months |  |
HTM Fair Value |  |
HTM Unrealized Losses |  |
Total temporarily impaired securities Fair Value | $ 832 |
Total temporarily impaired securities Unrealized Losses | $ 22 |

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