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Organization and Basis of Presentation - Accounting Standards Adopted (Details) - USD ($) $ in Millions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Jan. 01, 2019
Accounting Standards Adopted in 2019 |  |  |
Recognized lease liability on consolidated balance sheet | $ 45.6 |  |
Right-of-use asset on consolidated balance sheet | $ 46.1 |  |
Practical expedient, ASU No. 2016-02 | true |  |
ASU 2016-02 |  |  |
Accounting Standards Adopted in 2019 |  |  |
Recognized lease liability on consolidated balance sheet |  |  | $ 50.3
Right-of-use asset on consolidated balance sheet |  |  | $ 50.6
ASU 2018-15 |  |  |
Accounting Standards Adopted in 2019 |  |  |
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false] |  |  | true
Hosting arrangements that are service contracts | $ 6.3 |  |
ASU 2016-13 |  |  |
Accounting Standards Adopted in 2019 |  |  |
Percentage of estimated increase in ACL and the reserve for unfunded commitments | 15.00% | 10.00% |
Allocation period, impact Of adoption of ASU | 3 years |  |

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