XML 86 R48.htm IDEA: XBRL DOCUMENT
v3.20.1

Investment Securities - Gross Unrealized Losses and Fair Values of Investment Securities (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Available-for-Sale: |  |
Available-for-Sale, Less than 12 Months, Fair Value | $ 283.3 | $ 925.4
Available-for-sale, Less than 12 Months, Gross Unrealized Losses | (6.7) | (5.4)
Available-for-Sale, 12 Months or More, Fair Value | 213.5 | 202.5
Available-for-Sale, 12 Months or More, Gross Unrealized Losses | (2.8) | (1.8)
Available-for-Sale, Total Fair Value | 496.8 | 1,127.9
Available-for-Sale, Total Gross Unrealized Losses | (9.5) | (7.2)
Obligations of U.S. government agencies |  |
Available-for-Sale: |  |
Available-for-Sale, Less than 12 Months, Fair Value | 19.9 | 185.3
Available-for-sale, Less than 12 Months, Gross Unrealized Losses | (0.1) | (0.8)
Available-for-Sale, 12 Months or More, Fair Value | 0.0 | 0.0
Available-for-Sale, 12 Months or More, Gross Unrealized Losses | 0.0 | 0.0
Available-for-Sale, Total Fair Value | 19.9 | 185.3
Available-for-Sale, Total Gross Unrealized Losses | (0.1) | (0.8)
U.S. agency residential mortgage-backed securities & collateralized mortgage obligations |  |
Available-for-Sale: |  |
Available-for-Sale, Less than 12 Months, Fair Value | 143.5 | 740.1
Available-for-sale, Less than 12 Months, Gross Unrealized Losses | (1.7) | (4.6)
Available-for-Sale, 12 Months or More, Fair Value | 133.6 | 155.9
Available-for-Sale, 12 Months or More, Gross Unrealized Losses | (1.0) | (1.4)
Available-for-Sale, Total Fair Value | 277.1 | 896.0
Available-for-Sale, Total Gross Unrealized Losses | (2.7) | (6.0)
Private mortgage-backed securities |  |
Available-for-Sale: |  |
Available-for-Sale, Less than 12 Months, Fair Value | 0.0 | 0.0
Available-for-sale, Less than 12 Months, Gross Unrealized Losses | 0.0 | 0.0
Available-for-Sale, 12 Months or More, Fair Value | 40.0 | 46.6
Available-for-Sale, 12 Months or More, Gross Unrealized Losses | (1.2) | (0.4)
Available-for-Sale, Total Fair Value | 40.0 | 46.6
Available-for-Sale, Total Gross Unrealized Losses | (1.2) | $ (0.4)
Corporate securities |  |
Available-for-Sale: |  |
Available-for-Sale, Less than 12 Months, Fair Value | 119.9 |
Available-for-sale, Less than 12 Months, Gross Unrealized Losses | (4.9) |
Available-for-Sale, 12 Months or More, Fair Value | 39.9 |
Available-for-Sale, 12 Months or More, Gross Unrealized Losses | (0.6) |
Available-for-Sale, Total Fair Value | 159.8 |
Available-for-Sale, Total Gross Unrealized Losses | $ (5.5) |

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |