Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2019	Sep. 30, 2020	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201601Member	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201601Member
Maximum | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing receivable, allowance for credit loss, period increase (decrease), percent			10.00%
Forecast | Minimum | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing receivable, allowance for credit loss, period increase (decrease), percent	5.00%