Nature of Business and Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details)	6 Months Ended
	Jun. 30, 2021
Buildings
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	39 years
Minimum | Building Improvements
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	15 years
Minimum | Furniture, Fixtures and Equipment
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	3 years
Maximum | Building Improvements
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	39 years
Maximum | Furniture, Fixtures and Equipment
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	10 years