Notes Payable - Revolving Credit Agreement (Details) - USD ($) $ in Millions			12 Months Ended
	Apr. 28, 2025	Apr. 29, 2022	Dec. 31, 2025	Dec. 31, 2024
Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Credit agreement, gross assets		$ 0.5
4.000% Senior Notes Due 2029 \| Senior Notes
Line of Credit Facility [Line Items]
Stated interest rate on note			4.00%
Base spread on variable rate			4.00%
4.000% Senior Notes Due 2029 \| Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Letters of credit outstanding			$ 19.5
Fifth Amended and Restated Credit Agreement \| Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility			1,900.0
Line of credit, amount outstanding			1,900.0
Letters of credit outstanding				$ 24.5
Line of credit facility, remaining borrowing capacity			$ 273.6
Variable interest rate		0.10%	3.72%
Fifth Amended and Restated Credit Agreement \| Line of Credit \| One Month \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Base spread on variable rate		0.10%
Fifth Amended and Restated Credit Agreement \| Line of Credit \| Three Months \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Base spread on variable rate		0.15%
Fifth Amended and Restated Credit Agreement \| Line of Credit \| Six Months \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Base spread on variable rate		0.25%
Fifth Amended and Restated Credit Agreement \| Minimum \| Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Base spread on variable rate		1.45%
Variable interest rate		0.50%	0.50%
Fifth Amended and Restated Credit Agreement \| Maximum \| Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Base spread on variable rate		2.10%
8.750% Senior Notes Due 2028 \| Senior Notes
Line of Credit Facility [Line Items]
Stated interest rate on note			8.75%
Base spread on variable rate			8.75%
8.750% Senior Notes Due 2028 \| Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit, amount outstanding			$ 1,600.0
Sixth Amendment And Restated Credit Agreement
Line of Credit Facility [Line Items]
Commitments by lenders	$ 972.5
Commitments by lenders	82.20%
Commitments by lenders remaining	17.80%
Sixth Amendment And Restated Credit Agreement \| Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility	$ 1,182.5
Line of credit facility, maximum increase	$ 95.0
The Credit Agreement \| Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Base spread on variable rate			1.85%

LGI Homes, Inc. 10-K