Annual report pursuant to Section 13 and 15(d)

Preliminary Values Assigned to Assets Acquired and Liabilities Assumed (Detail)

v3.3.1.900
Preliminary Values Assigned to Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Aug. 05, 2015
Dec. 31, 2014
Apr. 17, 2014
Dec. 31, 2013
Business Acquisition [Line Items]          
Goodwill $ 64,267   $ 42,991   $ 21,498
Energy Source          
Business Acquisition [Line Items]          
Tangible assets   $ 5,379      
Goodwill   21,276      
Intangible Assets   8,768      
Assets acquired   35,423      
Liabilities assumed   3,921      
Purchase price   $ 31,502      
Value Lighting          
Business Acquisition [Line Items]          
Current Assets       $ 16,260  
Goodwill       18,635  
Intangible Assets       19,951  
Other assets       2,901  
Assets acquired       57,747  
Accounts payable and other liabilities       12,613  
Deferred income tax liability       5,825  
Liabilities assumed       18,438  
Purchase price       $ 39,309