Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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-Publisher FASB
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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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No definition available.

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- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Business Acquisition - Fair Value (Details) - USD ($) $ in Thousands			12 Months Ended
	Apr. 03, 2017	Jul. 01, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Bonterra Builders, LLC
Fair value, Transaction Costs, and Goodwill
Intangibles		$ 2,000
Amortization of Intangible Assets			$ 500	$ 400	$ 300
Decrease in goodwill due to post-closing purchase price adjustments					1,700
Transaction and integration costs					$ 900
Savvy Homes
Fair value, Transaction Costs, and Goodwill
Transaction and integration costs			1,000
Trade Name \| Bonterra Builders, LLC
Fair value, Transaction Costs, and Goodwill
Intangibles		$ 1,400
Amortization period (in years)		5 years
Trade Name \| Savvy Homes
Fair value, Transaction Costs, and Goodwill
Intangibles	$ 407
Amortization period (in years)	2 years 9 months
Amortization of Intangible Assets			$ 100
Non-compete intangible asset \| Bonterra Builders, LLC
Fair value, Transaction Costs, and Goodwill
Intangibles		$ 600
Amortization period (in years)		3 years