Nature of Operations and Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) segment state	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)	Jan. 01, 2018 USD ($)
Summary of Significant Accounting Policies [Line Items]
Number of operating states | state	17
Number of operating segments | segment	5
Allowance for doubtful accounts receivable	$ 0	$ 0
Earnest money deposits	10,600	14,000
Impairment of real estate	2,000
Non-refundable cash deposits	43,000	42,600
Advertising and marketing costs	17,000	17,400	$ 12,600
Decrease retained earnings					$ 600
Earnest money deposits	10,592	13,990
Mortgage loans in process	37,600	26,200
Mortgage loans held for sale	185,246	112,394
Gains on sale of mortgage loans	32,200	22,000	5,800
Tax valuation allowance	0	0	0
Reserves for uncetain tax positions	0	0	$ 0
Goodwill impairment	0	0
Mortgage loans held for investment reclassified to prepaid and other assets		1,000
Derivative assets reclassified to prepaid and other assets		700
Right of use asset	18,854
Lease liability	19,306
Inspire [Member]
Summary of Significant Accounting Policies [Line Items]
Mortgage loans held for sale	185,200	112,400
Mortgage loans held for sale aggregate outstanding principal balance	$ 179,300	$ 108,000
ASC 842 [Member]
Summary of Significant Accounting Policies [Line Items]
Right of use asset				$ 17,700
Lease liability				$ 18,700
Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life	2 years
Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Weighted Average [Member] | Inspire [Member]
Summary of Significant Accounting Policies [Line Items]
Interest rate	3.90%	4.70%
Trade Names [Member] | Wade Jurney Homes [Member]
Summary of Significant Accounting Policies [Line Items]
Gain (loss) on assets impairment	$ (2,800)
Cell Phone Tower Lease [Member] | Wade Jurney Homes [Member]
Summary of Significant Accounting Policies [Line Items]
Gain (loss) on assets impairment	$ 800