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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, 2016 | Dec. 31, 2015
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Total temporarily impaired securities Fair Value | $ 15,909 | $ 181,692
Total temporarily impaired securities Unrealized Losses | 29 | 1,371
Securities in an Unrealized Loss Position for More than 12 Months |  |
Total temporarily impaired securities Fair Value | 24,186 | 31,395
Total temporarily impaired securities Unrealized Losses | 343 | 954
Total temporarily impaired securities Fair Value | 40,095 | 213,087
Total temporarily impaired securities Unrealized Losses | 372 | 2,325
Government-sponsored enterprise securities [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
AFS Fair Value | 9,992 | 5,993
AFS Unrealized Losses | 7 | 7
Securities in an Unrealized Loss Position for More than 12 Months |  |
AFS Fair Value | 2,997 | 2,978
AFS Unrealized Losses | 3 | 22
Total temporarily impaired securities Fair Value | 12,989 | 8,971
Total temporarily impaired securities Unrealized Losses | 10 | 29
Mortgage-backed securities [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
AFS Fair Value | 5,917 | 150,853
AFS Unrealized Losses | 22 | 1,148
Securities in an Unrealized Loss Position for More than 12 Months |  |
AFS Fair Value | 20,242 | 27,460
AFS Unrealized Losses | 262 | 863
Total temporarily impaired securities Fair Value | 26,159 | 178,313
Total temporarily impaired securities Unrealized Losses | 284 | 2,011
Corporate bonds [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
AFS Fair Value |  | 24,006
AFS Unrealized Losses |  | 210
Securities in an Unrealized Loss Position for More than 12 Months |  |
AFS Fair Value | 930 | 940
AFS Unrealized Losses | 70 | 60
Total temporarily impaired securities Fair Value | 930 | 24,946
Total temporarily impaired securities Unrealized Losses | 70 | 270
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 | 17 | 17
AFS Unrealized Losses | 8 | 9
Total temporarily impaired securities Fair Value | 17 | 17
Total temporarily impaired securities Unrealized Losses | 8 | 9
State and local governments [Member] |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
HTM Fair Value |  | 840
HTM Unrealized Losses |  | 6
Securities in an Unrealized Loss Position for More than 12 Months |  |
AFS Fair Value |  |
AFS Unrealized Losses |  |
HTM Fair Value |  |
HTM Unrealized Losses |  |
Total temporarily impaired securities Fair Value |  | 840
Total temporarily impaired securities Unrealized Losses |  | $ 6

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