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Summary of Estimates of Fair Values of Assets Acquired and Liabilities Assumed of PMG (Parenthetical) (Detail) - PMG
$ in Thousands
Dec. 04, 2015
USD ($)
Business Acquisition [Line Items]  
Intangible asset $ 10,582 [1]
Customer Lists  
Business Acquisition [Line Items]  
Intangible asset $ 10,582
[1] The Company has made an initial estimate of separate intangible assets acquired, being customer lists and order backlog, of $10.6 million. This assessment is under review and will be finalized within 12 months of the date of acquisition.