Intangible Assets (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 59,900,000	$ 52,500,000
Accumulated Amortization	(16,100,000)	(12,900,000)
Net Carrying Amount	43,809,000	39,595,000
Customer Contracts and back log
Finite-Lived Intangible Assets [Line Items]
Gross Cost	3,300,000	4,800,000
Accumulated Amortization	(3,100,000)	(4,500,000)
Net Carrying Amount	200,000	300,000
Customer relationships and product supply agreements
Finite-Lived Intangible Assets [Line Items]
Gross Cost	35,000,000	28,900,000
Accumulated Amortization	(7,900,000)	(4,500,000)
Net Carrying Amount	27,100,000	24,400,000
Non- compete agreement
Finite-Lived Intangible Assets [Line Items]
Gross Cost	1,400,000	1,100,000
Accumulated Amortization	(700,000)	(400,000)
Net Carrying Amount	700,000	700,000
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Cost	2,000,000	2,000,000
Accumulated Amortization	(600,000)	(300,000)
Net Carrying Amount	1,400,000	1,700,000
Trademarks / Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Cost	17,600,000	15,000,000
Accumulated Amortization	(3,400,000)	(2,900,000)
Net Carrying Amount	14,200,000	12,100,000
Other
Finite-Lived Intangible Assets [Line Items]
Gross Cost	600,000	700,000
Accumulated Amortization	(400,000)	(300,000)
Net Carrying Amount	$ 200,000	$ 400,000