Investments Unrealized Losses Less Than and Greater Than 12 Months (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | |
Sep. 30, 2015USD ($)security | Sep. 30, 2015USD ($)security | Sep. 30, 2014USD ($) | Dec. 31, 2014USD ($)security |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | $ 2,400 | $ 2,400 | $ 0 | |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 6,347 | $ 6,347 | | $ 2,475 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 161 | 161 | | 103 |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | $ 2,331 | $ 2,331 | | $ 948 |
Debt Securities In Continuous Loss Less Than 12 Months Fair Value | 172,894 | 172,894 | | 95,705 |
Debt Securities, Continuous Unrealized Loss Position for Less Than 12 Months | $ 5,002 | $ 5,002 | | $ 1,459 |
Debt Securities In Unrealized Loss Positions Qualitative Disclosure, Number Of Positions, Less Than 12 Months | security | 174 | 174 | | 96 |
Debt Securities In Continuous Loss Position 12 Months Or Longer, Fair Value | $ 29,707 | $ 29,707 | | $ 54,454 |
Debt Securities, Continuous Unrealized Loss Position for Greater Than 12 Months | $ 3,676 | $ 3,676 | | $ 1,964 |
Debt Securities In Unrealized Loss Positions Qualitative Disclosure, Number Of Positions,12 Months Or Greater | security | 30 | 30 | | 50 |
Debt Securities In Continuous Loss Position, Aggregate Fair Value | $ 202,601 | $ 202,601 | | $ 150,159 |
Debt Securities, Gross Unrealized and Unrecognized Losses | $ 8,678 | $ 8,678 | | $ 3,423 |
Debt Securities In Unrealized Loss Positions Qualitative Disclosure, Number Of Positions | security | 204 | 204 | | 146 |
US Government Agencies Debt Securities [Member] | | | | |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 0 | $ 0 | | $ 0 |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | 0 | 0 | | 0 |
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 | 86,825 | 86,825 | | 43,776 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 980 | $ 980 | | $ 318 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 85 | 85 | | 47 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 17,392 | $ 17,392 | | $ 33,716 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 1,957 | $ 1,957 | | $ 1,130 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 13 | 13 | | 24 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 104,217 | $ 104,217 | | $ 77,492 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 2,937 | $ 2,937 | | $ 1,448 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 98 | 98 | | 71 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 37,472 | $ 37,472 | | $ 21,233 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 615 | $ 615 | | $ 74 |
Number of Held to Maturity Securities In Continuous Loss Position Less Than 12 Months | security | 31 | 31 | | 16 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 2,430 | $ 2,430 | | $ 15,429 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 93 | $ 93 | | $ 314 |
Number of Held to Maturity Securities In Continuous Loss Position 12 Months or Greater | security | 5 | 5 | | 21 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value | $ 39,902 | $ 39,902 | | $ 36,662 |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | $ 708 | $ 708 | | $ 388 |
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 36 | 36 | | 37 |
Corporate 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 | $ 45,786 | $ 45,786 | | $ 26,671 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2,678 | $ 2,678 | | $ 780 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 53 | 53 | | 24 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 5,085 | $ 5,085 | | $ 2,530 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 730 | $ 730 | | $ 244 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 5 | 5 | | 2 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 50,871 | $ 50,871 | | $ 29,201 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 3,408 | $ 3,408 | | $ 1,024 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 58 | 58 | | 26 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 2,744 | $ 2,744 | | $ 3,866 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 728 | $ 728 | | $ 285 |
Number of Held to Maturity Securities In Continuous Loss Position Less Than 12 Months | security | 3 | 3 | | 4 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 4,664 | $ 4,664 | | $ 2,746 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 895 | $ 895 | | $ 275 |
Number of Held to Maturity Securities In Continuous Loss Position 12 Months or Greater | security | 4 | 4 | | 2 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value | $ 7,408 | $ 7,408 | | $ 6,612 |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | $ 1,623 | $ 1,623 | | $ 560 |
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 7 | 7 | | 6 |
Commercial Mortgage Backed Securities [Member] | | | | |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 0 | $ 0 | | $ 0 |
Residential Mortgage Backed Securities [Member] | | | | |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 67 | 67 | | 159 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1 | $ 1 | | $ 2 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 2 | 2 | | 5 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 136 | $ 136 | | $ 33 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 1 | $ 1 | | $ 1 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 3 | 3 | | 1 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 203 | $ 203 | | $ 192 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 2 | $ 2 | | $ 3 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 5 | 5 | | 6 |
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 | $ 132,678 | $ 132,678 | | $ 70,606 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 3,659 | $ 3,659 | | $ 1,100 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 140 | 140 | | 76 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 22,613 | $ 22,613 | | $ 36,279 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 2,688 | $ 2,688 | | $ 1,375 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 21 | 21 | | 27 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 155,291 | $ 155,291 | | $ 106,885 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 6,347 | 6,347 | | 2,475 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 40,216 | 40,216 | | 25,099 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1,343 | $ 1,343 | | $ 359 |
Number of Held to Maturity Securities In Continuous Loss Position Less Than 12 Months | security | 34 | 34 | | 20 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 7,094 | $ 7,094 | | $ 18,175 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 988 | $ 988 | | $ 589 |
Number of Held to Maturity Securities In Continuous Loss Position 12 Months or Greater | security | 9 | 9 | | 23 |
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value | $ 47,310 | $ 47,310 | | $ 43,274 |
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss | $ 2,331 | $ 2,331 | | $ 948 |
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 43 | 43 | | 43 |
Stock Mutual Funds [Member] | | | | |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 8,736 | $ 8,736 | | $ 5,224 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 67 | $ 67 | | $ 66 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 3 | 3 | | 4 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 0 | $ 0 | | $ 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 0 | $ 0 | | $ 0 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 0 | 0 | | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 8,736 | $ 8,736 | | $ 5,224 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 67 | $ 67 | | $ 66 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 3 | 3 | | 4 |
Bond Mutual Funds [Member] | | | | |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 31,668 | $ 31,668 | | $ 26,228 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 505 | $ 505 | | $ 796 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 2 | 2 | | 4 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 110 | $ 110 | | $ 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 29 | $ 29 | | $ 0 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 1 | 1 | | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 31,778 | $ 31,778 | | $ 26,228 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 534 | $ 534 | | $ 796 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 3 | 3 | | 4 |
Common Stock [Member] | | | | |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 41 | $ 41 | | $ 46 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 6 | $ 6 | | $ 1 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 3 | 3 | | 2 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 0 | $ 0 | | $ 4 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 17 | $ 17 | | $ 13 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 1 | 1 | | 9 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 41 | $ 41 | | $ 50 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 23 | $ 23 | | $ 14 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 4 | 4 | | 11 |
Preferred Stock [Member] | | | | |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 0 | $ 0 | | $ 234 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1 | $ 1 | | $ 2 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 1 | 1 | | 4 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 0 | $ 0 | | $ 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 0 | $ 0 | | $ 0 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 0 | 0 | | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 0 | $ 0 | | $ 234 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 1 | $ 1 | | $ 2 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 1 | 1 | | 4 |
Equity Securities [Member] | | | | |
Schedule of Available-for-sale Securities [Line Items] | | | | |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 40,445 | $ 40,445 | | $ 31,732 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 579 | $ 579 | | $ 865 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security | 9 | 9 | | 14 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | $ 110 | $ 110 | | $ 4 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 46 | $ 46 | | $ 13 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security | 2 | 2 | | 9 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 40,555 | $ 40,555 | | $ 31,736 |
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | $ 625 | $ 625 | | $ 878 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security | 11 | 11 | | 23 |