Summary of Significant Accounting Policies - Accounting Pronouncements (Details) - USD ($) $ in Millions |
3 Months Ended | |||
---|---|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Jan. 01, 2019 |
|
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
Operating ROU assets | $ 10.8 | $ 12.4 | ||
Total lease liabilities | $ 10.2 | $ 11.7 | ||
AS 2016-02 | ||||
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
Operating ROU assets | $ 5.1 | |||
Total lease liabilities | $ 5.1 | |||
ASU 2018-02 | ||||
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
Deferred tax adjustments | $ 1.1 |