Business Acquisition (Purchase Price) (Details) $ in Thousands	Feb. 12, 2018 USD ($) shares
CalAtlantic Group, Inc.
Business Acquisition [Line Items]
Goodwill	$ 3,300,000
CalAtlantic shares assumed to elect cash conversion (in shares) | shares	24,083,091
CalAtlantic shares assumed to exchange (in shares) | shares	93,942,788
Consideration attributable to cash including fractional shares	$ 1,162,341
Total purchase price	$ 6,232,347
CalAtlantic Group, Inc. | Class A Common Stock
Business Acquisition [Line Items]
Exchange ratio for Class A common stock	0.885
Number of shares of common stock to be issued in exchange (in shares) | shares	83,138,277
Consideration attributable to common stock and equity awards (in shares)	$ 4,933,425
CalAtlantic Group, Inc. | Class B Common Stock
Business Acquisition [Line Items]
Exchange ratio for Class A common stock	0.0177
Number of shares of common stock to be issued in exchange (in shares) | shares	1,662,172
Consideration attributable to common stock and equity awards (in shares)	$ 77,823
CalAtlantic Group, Inc.
Business Acquisition [Line Items]
Common stock outstanding (in shares) | shares	118,025,879
Equity Awards Convertible Upon Change in Control | CalAtlantic Group, Inc.
Business Acquisition [Line Items]
Consideration attributable to common stock and equity awards (in shares)	$ 58,758
Homebuilding Central | CalAtlantic Group, Inc.
Business Acquisition [Line Items]
Goodwill	$ 495,000