General form of registration statement for all companies including face-amount certificate companies

CONDENSED CONSOLIDATED INTERIM STATEMENTS OF OPERATIONS (Parenthetical)

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CONDENSED CONSOLIDATED INTERIM STATEMENTS OF OPERATIONS (Parenthetical) - Landsea Homes [Member] - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Related party interest, cost of sales $ 8,653,000 $ 7,256,000      
Related party interest, joint ventures $ 903,000 $ 1,630,000 $ 1,908,000 $ 4,095,000 $ 0
Home sales [Member]          
Related party interest, cost of sales     15,526,000 8,978,000 981,000
Lot sales [Member]          
Related party interest, cost of sales     $ 120,000 $ 186,000 $ 1,697,000