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Investments (Held-To-Maturity Securities Disclosure) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 380,255 | $ 390,622
Net Unrealized Gains (Losses) | 1,801 | 2,257
Carrying Value | 382,056 | 392,879
Unrecognized Holding Gains | 21,480 | 24,102
Unrecoginzed Holding Losses | 0 | 0
Fixed income securities, held-to-maturity, fair value | 403,536 | 416,981
Held To Maturity securities average duration | 2 years 2 months |
Foreign Government [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 5,292 | 5,292
Net Unrealized Gains (Losses) | 110 | 131
Carrying Value | 5,402 | 5,423
Unrecognized Holding Gains | 150 | 168
Unrecoginzed Holding Losses | 0 | 0
Fixed income securities, held-to-maturity, fair value | 5,552 | 5,591
Obligations of States and Political Subdivisions [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 344,360 | 348,109
Net Unrealized Gains (Losses) | 3,475 | 4,013
Carrying Value | 347,835 | 352,122
Unrecognized Holding Gains | 16,472 | 17,634
Unrecoginzed Holding Losses | 0 | 0
Fixed income securities, held-to-maturity, fair value | 364,307 | 369,756
Corporate Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 21,903 | 28,174
Net Unrealized Gains (Losses) | (341) | (346)
Carrying Value | 21,562 | 27,828
Unrecognized Holding Gains | 2,902 | 2,446
Unrecoginzed Holding Losses | 0 | 0
Fixed income securities, held-to-maturity, fair value | 24,464 | 30,274
Asset-backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 3,347 | 3,413
Net Unrealized Gains (Losses) | (621) | (655)
Carrying Value | 2,726 | 2,758
Unrecognized Holding Gains | 640 | 657
Unrecoginzed Holding Losses | 0 | 0
Fixed income securities, held-to-maturity, fair value | 3,366 | 3,415
Commercial Mortgage-backed Securities (CMBS) [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 5,353 | 5,634
Net Unrealized Gains (Losses) | (822) | (886)
Carrying Value | 4,531 | 4,748
Unrecognized Holding Gains | 1,316 | 3,197
Unrecoginzed Holding Losses | 0 | 0
Fixed income securities, held-to-maturity, fair value | $ 5,847 | $ 7,945

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- Definition This item represents debt securities categorized as held-to-maturity, at cost, net of adjustments made for amortization and net unrealized gains (losses) resulting from: (i) other-than-temporary impairments and (ii) a previous available-for-sale designation. + References No definition available. + Details
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- Definition As of the balance sheet date, the excess of fair value over carrying value of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain. + References No definition available. + Details
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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 As of the balance sheet date, the excess of carrying value over fair value of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding loss. + 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 (f) -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=28360136&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 (a) -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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