Summary of Significant Accounting Policies - Operating, Accounting and Reporting Considerations Related to COVID-19 (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2020	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2021
Accounting Policies [Abstract]
Deferral period for payment deferrals			90 days
Remaining payment deferrals			$ 16.6
PPP loans originations	$ 247.5	$ 113.1
Amount of PPP loans outstanding				$ 39.0