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Investments (Held-To-Maturity Securities Disclosure) (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 229,455 | $ 317,179
Net Unrealized Gains (Losses) | 414 | 958
Carrying Value | 229,869 | 318,137
Unrecognized Holding Gains | 10,519 | 15,824
Unrecognized Holding Losses | 0 | 0
HTM, Fair Value | $ 240,388 | 333,961
Held-to-maturity Securities Average Duration | 1 year 6 months |
Foreign Government [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost |  | 5,292
Net Unrealized Gains (Losses) |  | 47
Carrying Value |  | 5,339
Unrecognized Holding Gains |  | 55
Unrecognized Holding Losses |  | 0
HTM, Fair Value |  | 5,394
Obligations of States and Political Subdivisions [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 205,443 | 285,301
Net Unrealized Gains (Losses) | 1,108 | 2,071
Carrying Value | 206,551 | 287,372
Unrecognized Holding Gains | 7,423 | 11,760
Unrecognized Holding Losses | 0 | 0
HTM, Fair Value | 213,974 | 299,132
Corporate Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 18,147 | 18,899
Net Unrealized Gains (Losses) | (241) | (273)
Carrying Value | 17,906 | 18,626
Unrecognized Holding Gains | 2,467 | 2,796
Unrecognized Holding Losses | 0 | 0
HTM, Fair Value | 20,373 | 21,422
Asset-Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 1,209 | 2,818
Net Unrealized Gains (Losses) | (157) | (455)
Carrying Value | 1,052 | 2,363
Unrecognized Holding Gains | 158 | 460
Unrecognized Holding Losses | 0 | 0
HTM, Fair Value | 1,210 | 2,823
Commercial Mortgage Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 4,656 | 4,869
Net Unrealized Gains (Losses) | (296) | (432)
Carrying Value | 4,360 | 4,437
Unrecognized Holding Gains | 471 | 753
Unrecognized Holding Losses | 0 | 0
HTM, Fair Value | $ 4,831 | $ 5,190

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- Definition The remaining aggregate increase (decrease) in the market value of held-to-maturity securities either (i) prior to the securities' transfer to a held-to-maturity designation or (ii) resulting from a non-credit other-than-temporary impairment. + References No definition available. + Details
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- Definition Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.6) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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