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Securities Continuous Unrealized Loss (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
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Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 9,205 | $ 50,769
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | 35 | 370
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 12,252 | 43,597
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | 39 | 935
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 21,457 | 94,366
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | 74 | 1,305
US Government and Government Agencies and Authorities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 0 | 8,157
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | 0 | 2
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 | 24,444
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | 0 | 516
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 0 | 32,601
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | 0 | 518
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 8,655 | 42,345
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | 30 | 367
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 12,252 | 18,184
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | 39 | 413
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 20,907 | 60,529
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | 69 | 780
US States and Political Subdivisions Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 550 | 267
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | 5 | 1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 | 969
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | 0 | 6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 550 | 1,236
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | $ 5 | $ 7

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