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Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2020
Accounting Standards Update 2016-13 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] | true
New Accounting Pronouncement or Change in Accounting Principle, Prior Period Not Restated [true false] | false
Accounting Standards Update 2019-12 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] | true
New Accounting Pronouncement or Change in Accounting Principle, Prior Period Not Restated [true false] | false
Change in Accounting Principle, Accounting Standards Update, Adoption Date | Jan. 01, 2020
Accounting Standards Update 2020-04 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] | true
Change in Accounting Principle, Accounting Standards Update, Adoption Date | Mar. 12, 2020

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