Business Acquisition - Purchase Price Consideration and Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands		9 Months Ended
	Apr. 03, 2017	Sep. 30, 2017	Dec. 31, 2016
Business Acquisitions
Liabilities incurred		$ 1,818
Assets
Goodwill		$ 30,003	$ 19,285
Savvy
Business Acquisitions
Cash payments to acquire businesses	$ 41,150
Total consideration	42,968
Assets
Receivables and other assets	159
Land and other inventories	39,311
Property, plant and equipment	455
Intangibles	400
Goodwill	10,718
Total assets acquired	51,050
Liabilities
Accounts payable	7,692
Accrued and other liabilities	390
Total liabilities assumed	8,082
Total net assets acquired	42,968
Trade Name | Savvy
Assets
Intangibles	407
Earn-out | Savvy
Business Acquisitions
Liabilities incurred	$ 1,818