Business Acquisition - Additional Information (Detail) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Mar. 21, 2016	Jul. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Acquisition of a business, net of cash acquired			$ 110,319	$ 6,000
Goodwill			46,454	$ 8,028	$ 2,350
BRC Restoration Specialists, Inc. [Member]
Business Acquisition [Line Items]
Purchase price		$ 8,000
Issuance of common stock for business acquisition, number of restricted common shares		79,850
Issuance of common stock for business acquisition		$ 2,000
Acquisition of a business, net of cash acquired		6,000
Intangible assets value of business acquired		2,200
Goodwill		$ 5,700
ZAC Business Acquisition [Member]
Business Acquisition [Line Items]
Acquisition of a business, net of cash acquired	$ 110,319
Intangible assets value of business acquired	31,845
Goodwill	$ 38,426
Percentage of outstanding stock acquired	100.00%
Net decrease in goodwill			(1,800)
Increase in intangible assets			42
Increase relating to value of business acquired			2,600
Increase in deferred tax liabilities			$ 1,000