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Investments (Investments Pledged as Collateral) (Details) $ in Millions | Dec. 31, 2016 USD ($)
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Schedule of Available-for-sale Securities [Line Items] |
Assets Held by Insurance Regulators | $ 24.8
Securities pledged as collateral for reinsurance obligations | 150.5
U.S. Government and Government Agencies [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Assets Held by Insurance Regulators | 24.8
Securities pledged as collateral for reinsurance obligations | 32.2
Commercial Mortgage Backed Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Assets Held by Insurance Regulators | 0.0
Securities pledged as collateral for reinsurance obligations | 0.5
Residential Mortgage Backed Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Assets Held by Insurance Regulators | 0.0
Securities pledged as collateral for reinsurance obligations | 117.8
Federal Home Loan Bank of New York [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 58.2
Federal Home Loan Bank of New York [Member] | U.S. Government and Government Agencies [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 0.0
Federal Home Loan Bank of New York [Member] | Commercial Mortgage Backed Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 0.0
Federal Home Loan Bank of New York [Member] | Residential Mortgage Backed Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 58.2
Federal Home Loan Bank of Indianapolis [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 67.5
Federal Home Loan Bank of Indianapolis [Member] | U.S. Government and Government Agencies [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 7.4
Federal Home Loan Bank of Indianapolis [Member] | Commercial Mortgage Backed Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 0.5
Federal Home Loan Bank of Indianapolis [Member] | Residential Mortgage Backed Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | $ 59.6

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- Definition Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 320 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28366721&loc=d3e22002-158495 + Details
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