Unaudited Summarized Quarterly Financial Information - Summarized Unaudited Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Home sales	$ 623,283	$ 490,304	$ 422,633	$ 258,854	$ 473,221	$ 342,628	$ 325,059	$ 261,295	$ 1,796,528	$ 1,406,040	$ 1,104,052
Cost of sales	(505,337)	(401,700)	(353,057)	(218,455)	(392,632)	(285,896)	(268,638)	(215,171)
Gross profit	117,946	88,604	69,576	40,399	80,589	56,732	56,421	46,124
Other income, costs and expenses, net	(101,210)	(58,544)	(49,325)	(49,695)	(54,163)	(40,218)	(41,335)	(36,183)
Net income	16,736	30,060	20,251	(9,296)	26,426	16,514	15,086	9,941	57,751	67,967	60,261
Net income available to common stockholders	$ 11,763	$ 27,418	$ 18,954	$ (10,000)	$ 23,052	$ 13,069	$ 14,561	$ 9,014	$ 48,135	$ 59,696	$ 57,336
(Loss) Income per common share:
Basic (in USD per share)	$ 0.32	$ 0.74	$ 0.51	$ (0.27)	$ 0.63	$ 0.36	$ 0.40	$ 0.25	$ 1.30	$ 1.62	$ 1.57
Diluted (in USD per share)	$ 0.30	$ 0.71	$ 0.49	$ (0.27)	$ 0.60	$ 0.34	$ 0.38	$ 0.24	$ 1.24	$ 1.55	$ 1.48