Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 43,665
Accumulated Amortization	(10,661)	$ (8,881)
Net Carrying Amount	33,004	$ 34,784
Customer Contracts and back log
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,496
Accumulated Amortization	(4,192)
Net Carrying Amount	304
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,455
Accumulated Amortization	(3,654)
Net Carrying Amount	20,801
Favorable lease
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	334
Accumulated Amortization	(102)
Net Carrying Amount	232
Non-Compete agreement
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	740
Accumulated Amortization	(235)
Net Carrying Amount	505
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	268
Accumulated Amortization	(165)
Net Carrying Amount	103
Product certification
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	61
Accumulated Amortization	(59)
Net Carrying Amount	2
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,953
Accumulated Amortization	(222)
Net Carrying Amount	1,731
Trademarks / Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,358
Accumulated Amortization	(2,032)
Net Carrying Amount	$ 9,326