Supplemental Guarantor Information Supplemental Guarantor Information - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue	$ 481,109	$ 437,857
Land and housing	388,467	348,702
General and administrative	30,699	27,951
Selling	31,551	30,063
Acquisition and integration costs	0	1,700
Equity in loss (income) from joint venture arrangements	121	(310)
Interest	6,792	5,878
Total costs and expenses	457,630	413,984
Income before income taxes	23,479	23,873
Provision for income taxes	5,756	5,810
Equity In subsidiaries	0	0
Net income	17,723	18,063
Consolidation, Eliminations [Member]
Revenue	0	0
Land and housing	0	0
General and administrative	0	0
Selling	0	0
Acquisition and integration costs		0
Equity in loss (income) from joint venture arrangements	0	0
Interest	0	0
Total costs and expenses	0	0
Income before income taxes	0	0
Provision for income taxes	0	0
Equity In subsidiaries	(17,723)	(18,063)
Net income	(17,723)	(18,063)
Parent Company [Member]
Revenue	0	0
Land and housing	0	0
General and administrative	0	0
Selling	0	0
Acquisition and integration costs		0
Equity in loss (income) from joint venture arrangements	0	0
Interest	0	0
Total costs and expenses	0	0
Income before income taxes	0	0
Provision for income taxes	0	0
Equity In subsidiaries	17,723	18,063
Net income	17,723	18,063
Guarantor Subsidiaries [Member]
Revenue	469,326	422,831
Land and housing	388,467	348,702
General and administrative	24,433	22,171
Selling	31,551	30,063
Acquisition and integration costs		1,700
Equity in loss (income) from joint venture arrangements	0	0
Interest	6,049	5,108
Total costs and expenses	450,500	407,744
Income before income taxes	18,826	15,087
Provision for income taxes	4,755	3,906
Equity In subsidiaries	0	0
Net income	14,071	11,181
Non-Guarantor Subsidiaries [Member]
Revenue	11,783	15,026
Land and housing	0	0
General and administrative	6,266	5,780
Selling	0	0
Acquisition and integration costs		0
Equity in loss (income) from joint venture arrangements	121	(310)
Interest	743	770
Total costs and expenses	7,130	6,240
Income before income taxes	4,653	8,786
Provision for income taxes	1,001	1,904
Equity In subsidiaries	0	0
Net income	$ 3,652	$ 6,882