Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Examination [Line Items]
Federal statutory income tax	21.00%	21.00%	21.00%
Tax valuation allowance	$ 0	$ 0
Reserves for uncertain tax positions	0	0
Income tax expense impacted by the benefit from Federal Energy Credits	2,596,000	$ 18,324,000	$ 16,451,000
Federal income tax credit for each home meets the statute	2,000
Maximum [Member] | Federal [Member]
Income Tax Examination [Line Items]
Federal income tax credit for each home meets the statute	$ 5,000
Income tax year under examination	2023
Minimum [Member] | Federal [Member]
Income Tax Examination [Line Items]
Federal income tax credit for each home meets the statute	$ 2,500
Income tax year under examination	2018