Summary of Significant Accounting Policies - Property and Equipment - Useful Lives (Details)	12 Months Ended
	Dec. 31, 2020
Building improvements | Minimum
Property and Equipment
Estimated useful lives of assets	2 years
Building improvements | Maximum
Property and Equipment
Estimated useful lives of assets	10 years
Equipment | Minimum
Property and Equipment
Estimated useful lives of assets	3 years
Equipment | Maximum
Property and Equipment
Estimated useful lives of assets	15 years
Capitalized internal-use software | Minimum
Property and Equipment
Estimated useful lives of assets	3 years
Capitalized internal-use software | Maximum
Property and Equipment
Estimated useful lives of assets	5 years