Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Narrative) (Details)

v3.21.2
Revenue Recognition (Narrative) (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]    
Estimated variable consideration related to contingent purchase $ 14.3 $ 2.9
Sale Of Real Estate Inventory To Homebuilder [Member]    
Segment Reporting Information [Line Items]    
Variable consideration related to estimated contingent purchase price $ 0.6