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Fair Value Disclosures - Narrative (Details) - Level 3
Sep. 30, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Percent of level three fair value assets and liabilities 32.00% 33.00%
Financial instruments level three percent 68.00% 71.00%