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Investments (Investments Pledged as Collateral) (Details) $ in Millions | Mar. 31, 2019 USD ($)
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Financial Instruments Owned and Pledged as Collateral [Line Items] |
Carrying Value Bonds On Deposit With Various State And Regulatory Agencies | $ 26.7
Securities Pledged As Collateral | 208.6
U.S. Government and Government Agencies [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Carrying Value Bonds On Deposit With Various State And Regulatory Agencies | 22.5
Securities Pledged As Collateral | 22.5
Obligations of States and Political Subdivisions [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Carrying Value Bonds On Deposit With Various State And Regulatory Agencies | 3.9
Securities Pledged As Collateral | 3.9
Corporate Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Carrying Value Bonds On Deposit With Various State And Regulatory Agencies | 0.3
Securities Pledged As Collateral | 0.3
Commercial Mortgage Backed Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Carrying Value Bonds On Deposit With Various State And Regulatory Agencies | 0.0
Securities Pledged As Collateral | 28.0
Residential Mortgage Backed Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Carrying Value Bonds On Deposit With Various State And Regulatory Agencies | 0.0
Securities Pledged As Collateral | 153.9
Federal Home Loan Bank of Indianapolis [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 64.5
Federal Home Loan Bank of Indianapolis [Member] | U.S. Government and Government Agencies [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 0.0
Federal Home Loan Bank of Indianapolis [Member] | Obligations of States and Political Subdivisions [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 0.0
Federal Home Loan Bank of Indianapolis [Member] | Corporate Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 0.0
Federal Home Loan Bank of Indianapolis [Member] | Commercial Mortgage Backed Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 7.2
Federal Home Loan Bank of Indianapolis [Member] | Residential Mortgage Backed Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 57.3
Federal Home Loan Bank of New York [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 117.4
Federal Home Loan Bank of New York [Member] | U.S. Government and Government Agencies [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 0.0
Federal Home Loan Bank of New York [Member] | Obligations of States and Political Subdivisions [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 0.0
Federal Home Loan Bank of New York [Member] | Corporate Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 0.0
Federal Home Loan Bank of New York [Member] | Commercial Mortgage Backed Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | 20.8
Federal Home Loan Bank of New York [Member] | Residential Mortgage Backed Securities [Member] |
Financial Instruments Owned and Pledged as Collateral [Line Items] |
Fixed Income Securities Pledged For FHLB Collateral | $ 96.6

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- Definition Amount of the collateral pledged in support of federal home loan bank advances outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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