Annual report pursuant to Section 13 and 15(d)

Detail of Certain Balance Sheet Accounts - Property and Equipment (Detail)

v2.4.0.6
Detail of Certain Balance Sheet Accounts - Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Buildings and leasehold improvements [Member]
Minimum [Member]
Dec. 31, 2012
Buildings and leasehold improvements [Member]
Maximum [Member]
Dec. 31, 2012
Operating equipment and vehicles [Member]
Minimum [Member]
Dec. 31, 2012
Operating equipment and vehicles [Member]
Maximum [Member]
Dec. 31, 2012
Fiber optic and related assets [Member]
Minimum [Member]
Dec. 31, 2012
Fiber optic and related assets [Member]
Maximum [Member]
Dec. 31, 2012
Office equipment, furniture and fixtures and information technology systems [Member]
Minimum [Member]
Dec. 31, 2012
Office equipment, furniture and fixtures and information technology systems [Member]
Maximum [Member]
Property, Plant and Equipment [Line Items]                    
Property and equipment of Estimated Useful Lives in Years     5 years 30 years 5 years 25 years 5 years 20 years 3 years 15 years
Land $ 16,101 $ 15,759                
Buildings and leasehold improvements 59,818 50,457                
Operating equipment and vehicles 1,045,248 917,269                
Fiber optic and related assets 350,521 319,303                
Office equipment, furniture and fixtures and information technology systems 95,779 81,282                
Construction work in progress 33,546 29,502                
Property and equipment, Gross 1,601,013 1,413,572                
Less - Accumulated depreciation and amortization (555,030) (474,670)                
Property and equipment, net $ 1,045,983 $ 938,902