Acquisition and Goodwill (Notes)	3 Months Ended
Mar. 31, 2018
Acquisition and Goodwill [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	Acquisition and Goodwill Acquisition In March 2018, we entered the Detroit, Michigan market through the acquisition of the homebuilding assets and operations of Pinnacle Homes. The purchase price was approximately $100.8 million. The results of Pinnacle Homes operations have been included in our financial statements since March 1, 2018, the effective date of the acquisition. As a result of the transaction, we recorded a provisional $16.4 million of goodwill (all of which is tax deductible) which relates to expected synergies from establishing a market presence in Detroit, the experience and knowledge of the acquired workforce and the capital efficient operating structure of the business acquired. The remaining basis of $84.4 million is almost entirely comprised of the fair value of the acquired inventory with an insignificant amount attributable to other assets and liabilities. In accordance with ASC 805-10, Business Combinations (“ASC 805”), we will update such balances, if necessary, upon further verification of the fair values on certain other assets, more relevant history on profitability of backlog, and further understanding of cost to complete activities, if any, on purchased communities. Goodwill Goodwill represents the excess of the purchase price paid over the fair value of the net assets acquired and liabilities assumed in business combinations. Because the purchase price allocation is subject to change within a measurement period of up to one year from the acquisition date pursuant to ASC 805, in connection with the Company’s acquisition of the homebuilding assets and operations of Pinnacle Homes in Detroit, Michigan described above, the Company recorded a provisional amount of goodwill of approximately $16.4 million as of March 31, 2018, which is included as Goodwill in our Unaudited Condensed Consolidated Balance Sheets. This provisional amount was based on the estimated fair values of the acquired assets and liabilities at the date of the acquisition in accordance with ASC 350, Intangibles, Goodwill and Other (“ASC 350”). In accordance with ASC 350, the Company analyzes goodwill for impairment on an annual basis (or more often if indicators of impairment exist). The Company performs a qualitative assessment to determine whether the existence of events or circumstances leads to a determination that it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount. If the qualitative assessment indicates that it is more-likely-than-not that the fair value of the reporting unit is less than its carrying amount, then a quantitative assessment is performed to determine the reporting unit’s fair value. If the reporting unit’s carrying value exceeds its fair value, then an impairment loss is recognized for the amount of the excess of the carrying amount over the reporting unit’s fair value. As of March 31, 2018, there were no indicators that our goodwill was impaired.

Acquisition and Goodwill

Acquisition

In March 2018, we entered the Detroit, Michigan market through the acquisition of the homebuilding assets and operations of Pinnacle Homes. The purchase price was approximately $100.8 million. The results of Pinnacle Homes operations have been included in our financial statements since March 1, 2018, the effective date of the acquisition. As a result of the transaction, we recorded a provisional $16.4 million of goodwill (all of which is tax deductible) which relates to expected synergies from establishing a market presence in Detroit, the experience and knowledge of the acquired workforce and the capital efficient operating structure of the business acquired. The remaining basis of $84.4 million is almost entirely comprised of the fair value of the acquired inventory with an insignificant amount attributable to other assets and liabilities. In accordance with ASC 805-10, Business Combinations (“ASC 805”), we will update such balances, if necessary, upon further verification of the fair values on certain other assets, more relevant history on profitability of backlog, and further understanding of cost to complete activities, if any, on purchased communities.

Goodwill

Goodwill represents the excess of the purchase price paid over the fair value of the net assets acquired and liabilities assumed in business combinations. Because the purchase price allocation is subject to change within a measurement period of up to one year from the acquisition date pursuant to ASC 805, in connection with the Company’s acquisition of the homebuilding assets and operations of Pinnacle Homes in Detroit, Michigan described above, the Company recorded a provisional amount of goodwill of approximately $16.4 million as of March 31, 2018, which is included as Goodwill in our Unaudited Condensed Consolidated Balance Sheets. This provisional amount was based on the estimated fair values of the acquired assets and liabilities at the date of the acquisition in accordance with ASC 350, Intangibles, Goodwill and Other (“ASC 350”).

In accordance with ASC 350, the Company analyzes goodwill for impairment on an annual basis (or more often if indicators of impairment exist). The Company performs a qualitative assessment to determine whether the existence of events or circumstances leads to a determination that it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount. If the qualitative assessment indicates that it is more-likely-than-not that the fair value of the reporting unit is less than its carrying amount, then a quantitative assessment is performed to determine the reporting unit’s fair value. If the reporting unit’s carrying value exceeds its fair value, then an impairment loss is recognized for the amount of the excess of the carrying amount over the reporting unit’s fair value. As of March 31, 2018, there were no indicators that our goodwill was impaired.