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Investments and Derivative Instruments Level 4 Concentration of Credit Risk (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014
Concentration of Credit Risk [Line Items] |  |
Concentration Risk, Benchmark Description | greater than 10% of the Company's stockholders' equity |
Fair Value, Concentration of Risk, Investments | $ 0 | $ 0
Commercial Mortgage Backed Securities [Member] |  |
Concentration of Credit Risk [Line Items] |  |
Largest Exposure by Sector, Percent of Invested Assets | 6.00% |
GOLDMAN SACH MTF [Member] | Corporate Debt Securities [Member] |  |
Concentration of Credit Risk [Line Items] |  |
Largest Exposure by Issuer, Percent of Invested Assets | 1.00% |
Morgan Stanley [Member] | Corporate Debt Securities [Member] |  |
Concentration of Credit Risk [Line Items] |  |
Largest Exposure by Issuer, Percent of Invested Assets | 1.00% |
J.P. Morgan Chase [Member] | Corporate Debt Securities [Member] |  |
Concentration of Credit Risk [Line Items] |  |
Largest Exposure by Issuer, Percent of Invested Assets | 1.00% |
ILLINOIS | US States and Political Subdivisions Debt Securities [Member] |  |
Concentration of Credit Risk [Line Items] |  |
Largest Exposure by Issuer, Percent of Invested Assets | 1.00% |
Municipal Bonds [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Concentration of Credit Risk [Line Items] |  |
Largest Exposure by Sector, Percent of Invested Assets | 17.00% | 17.00%
Financial Services [Member] | Corporate Debt Securities [Member] |  |
Concentration of Credit Risk [Line Items] |  |
Largest Exposure by Sector, Percent of Invested Assets | 9.00% | 7.00%
Public Utility, Bonds [Member] | Corporate Debt Securities [Member] |  |
Concentration of Credit Risk [Line Items] |  |
Largest Exposure by Sector, Percent of Invested Assets |  | 6.00%

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- Definition Identifies or describes the benchmark that serves as the denominator in the calculation of the percentage of concentration risk. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611 + Details
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- Definition This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -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 -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph a, f, g -Article 7 + Details
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