Business Acquisition - Fair Value (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 01, 2015	Dec. 31, 2016	Dec. 31, 2015
Fair value, Transaction Costs, and Goodwill
Amortization of Intangible Assets		$ 400	$ 300
Bonterra Builders, LLC
Fair value, Transaction Costs, and Goodwill
Decrease in goodwill due to post-closing purchase price adjustments			1,700
Transaction and integration costs			900
Goodwill expected tax deductible amount		$ 10,800	$ 7,000
Level 3 | Bonterra Builders, LLC
Fair value, Transaction Costs, and Goodwill
Intangibles	$ 2,000
Trade Name | Bonterra Builders, LLC
Fair value, Transaction Costs, and Goodwill
Intangibles	$ 1,400
Amortization period (in years)	5 years
Non-compete intangible asset | Bonterra Builders, LLC
Fair value, Transaction Costs, and Goodwill
Intangibles	$ 600
Amortization period (in years)	3 years