Annual report pursuant to Section 13 and 15(d)

Acquisitions - Additional Information (Detail)

v2.4.0.6
Acquisitions - Additional Information (Detail) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
10.875% Senior Notes [Member]
Jun. 30, 2012
10.875% Senior Notes [Member]
Mar. 16, 2011
10.875% Senior Notes [Member]
Dec. 31, 2012
TagWorks [Member]
Mar. 30, 2012
TagWorks [Member]
Oct. 31, 2011
TagWorks [Member]
Mar. 16, 2011
TagWorks [Member]
Dec. 31, 2012
Ook [Member]
Dec. 01, 2011
Ook [Member]
Dec. 31, 2012
Ook [Member]
Maximum [Member]
Dec. 31, 2012
Servalite [Member]
Dec. 29, 2010
Servalite [Member]
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]                          
Purchase price $ 715,736,000             $ 40,000,000   $ 14,811,000     $ 21,517,000
Additional contingent consideration           12,500,000         6,000,000    
Fair value of the contingent consideration                 0        
Intangible assets and goodwill are deductible for income tax purposes 15 years       15 years       15 years     15 years  
Additional consideration             12,500,000            
Period for agreement         17 years                
Principal amount         $ 50,000,000                
Interest rate on senior Notes   10.875% 10.875% 10.875%                  
Debt instrument maturity due   2018