Acquisitions - Schedule of Recognized Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Jan. 01, 2017	Dec. 31, 2016
Assets acquired:
Goodwill	$ 446,041		$ 437,935
Dominion Interior Supply
Assets acquired:
Accounts receivable		$ 1,425
Other receivables		88
Inventories		1,119
Prepaids and other current assets		12
Property and equipment		476
Goodwill		7,192
Intangible assets		3,300
Other assets		5
Total assets acquired		13,617
Liabilities assumed:
Accounts payable		(396)
Accrued expenses and other current liabilities		(26)
Total liabilities assumed		(422)
Total net assets acquired		$ 13,195