Investments Unrealized Losses (Details) $ in Thousands | Sep. 30, 2016USD ($)security | Dec. 31, 2015USD ($)security |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | $ 22,532 | $ 111,416 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (162) | (2,152) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 5,469 | 12,153 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (123) | (418) |
Available-for-sale securities, continuous unrealized loss position, fair value | 28,001 | 123,569 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (285) | (2,570) |
US Government Agencies Debt Securities | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 1,879 | 9,712 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (3) | (49) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 0 | 3,256 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | (35) |
Available-for-sale securities, continuous unrealized loss position, fair value | 1,879 | 12,968 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (3) | (84) |
US States and Political Subdivisions Debt Securities | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 1,446 | 5,870 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (4) | (46) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 0 | 553 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | (6) |
Available-for-sale securities, continuous unrealized loss position, fair value | 1,446 | 6,423 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (4) | (52) |
Total Corporate | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 3,516 | 43,379 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (63) | (1,514) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 2,334 | 1,894 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (101) | (197) |
Available-for-sale securities, continuous unrealized loss position, fair value | 5,850 | 45,273 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (164) | (1,711) |
Corporate Debt Securities, Banking and Financial Services | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 1,323 | 12,216 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (8) | (161) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 434 | 595 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | (5) |
Available-for-sale securities, continuous unrealized loss position, fair value | 1,757 | 12,811 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (8) | (166) |
Corporate Debt Securities, Consumer Goods | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 515 | 6,044 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (11) | (121) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 0 | 0 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | 0 |
Available-for-sale securities, continuous unrealized loss position, fair value | 515 | 6,044 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (11) | (121) |
Corporate Debt Securities, Capital Goods | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 731 | 9,425 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (34) | (428) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 98 | 755 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (9) | (128) |
Available-for-sale securities, continuous unrealized loss position, fair value | 829 | 10,180 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (43) | (556) |
Corporate Debt Securities, Energy | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 253 | 3,862 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (2) | (337) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 795 | 544 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (57) | (64) |
Available-for-sale securities, continuous unrealized loss position, fair value | 1,048 | 4,406 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (59) | (401) |
Corporate Debt Securities, Telecommunications and Utilities | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 694 | 8,811 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (8) | (450) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 1,007 | 0 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (35) | 0 |
Available-for-sale securities, continuous unrealized loss position, fair value | 1,701 | 8,811 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (43) | (450) |
Corporate Debt Securities, Health Care | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 0 | 3,021 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | 0 | (17) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 0 | 0 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | 0 |
Available-for-sale securities, continuous unrealized loss position, fair value | 0 | 3,021 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | 0 | (17) |
Fixed Income, U.S., Mortgage Backed, Total | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 9,434 | 35,190 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (59) | (384) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 2,874 | 5,366 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (22) | (173) |
Available-for-sale securities, continuous unrealized loss position, fair value | 12,308 | 40,556 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (81) | (557) |
Fixed Income, U.S., Mortgage Backed, Agency | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 5,979 | 25,168 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (28) | (255) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 1,261 | 1,921 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (9) | (58) |
Available-for-sale securities, continuous unrealized loss position, fair value | 7,240 | 27,089 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (37) | (313) |
Commercial Mortgage Backed Securities | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 3,455 | 10,022 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (31) | (129) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 1,613 | 3,445 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (13) | (115) |
Available-for-sale securities, continuous unrealized loss position, fair value | 5,068 | 13,467 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (44) | (244) |
Asset-backed Securities | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 5,272 | 16,203 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (18) | (113) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 261 | 1,084 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | (7) |
Available-for-sale securities, continuous unrealized loss position, fair value | 5,533 | 17,287 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | (18) | (120) |
Fixed income securities | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | 21,547 | 110,354 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (147) | (2,106) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 5,469 | 12,153 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | (123) | (418) |
Available-for-sale securities, continuous unrealized loss position, fair value | 27,016 | 122,507 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | $ (270) | $ (2,524) |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions | security | 86 | 435 |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year | security | 26 | 35 |
Equities | | |
Gain (Loss) on Investments [Line Items] | | |
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value | $ 985 | $ 1,062 |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss | (15) | (46) |
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value | 0 | 0 |
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | 0 |
Available-for-sale securities, continuous unrealized loss position, fair value | 985 | 1,062 |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | $ (15) | $ (46) |
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions | security | 1 | 1 |