Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets Subject to Amortization (Detail)

Intangible Assets Subject to Amortization (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (9,771)	$ (8,756)
Net Carrying Amount	33,894us-gaap_FiniteLivedIntangibleAssetsNet	34,784us-gaap_FiniteLivedIntangibleAssetsNet
Customer Contracts and backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,496
Accumulated Amortization	4,115
Net Carrying Amount	381
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,455
Accumulated Amortization	3,298
Net Carrying Amount	21,157
Favorable leases
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	334
Accumulated Amortization	83
Net Carrying Amount	251
Non-compete agreement
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	740
Accumulated Amortization	193
Net Carrying Amount	547
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	268
Accumulated Amortization	159
Net Carrying Amount	109
Product certification
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	61
Accumulated Amortization	58
Net Carrying Amount	3
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,953
Accumulated Amortization	209
Net Carrying Amount	1,744
Trademarks / Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,358
Accumulated Amortization	1,656
Net Carrying Amount	9,702
Intangible Asset Amortization
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,665
Accumulated Amortization	9,771
Net Carrying Amount	$ 33,894