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Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
1 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2012
Center
Dec. 31, 2012
Services
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Executives [Member]
Minimum [Member]
Dec. 31, 2012
Executives [Member]
Maximum [Member]
Dec. 31, 2012
Property, plant and equipment [Member]
Dec. 31, 2012
2.50% Convertible Subordinated Notes [Member]
Mar. 31, 2007
2.50% Convertible Subordinated Notes [Member]
Dec. 31, 2012
3.00% Convertible Subordinated Notes [Member]
Sep. 30, 2007
3.00% Convertible Subordinated Notes [Member]
Dec. 31, 2012
4.75% Convertible Subordinated Notes [Member]
Jun. 30, 2009
4.75% Convertible Subordinated Notes [Member]
Dec. 31, 2012
2.50% Convertible Subordinated Notes Due April 2012 [Member]
Dec. 31, 2012
3.00% Convertible Subordinated Notes Due October 2014 [Member]
Dec. 31, 2012
Americas [Member]
Dec. 31, 2012
EMEA [Member]
Dec. 31, 2012
Asia-Pacific [Member]
Dec. 31, 2012
Americas and Europe, Middle East and Africa and Asia-Pacific [Member]
Markets
Item Effected [Line Items]                                      
Number of markets data center operates in 9                                   31
Number of network providers that provide internet access   900                                  
Percentage of Internet access provided   90.00%                                  
Cash equivalents maturity period   90 days                                  
Short term investment maturity   90 days and one year                                  
A single customer is accounted for a percentage of accounts receivable or revenues for a period   10.00% 10.00% 10.00%                              
Depreciation expense on property, plant and equipment   $ 374,716,000 $ 328,610,000 $ 246,544,000     $ (4,968,000)                        
Discount rate                               10.00% 10.00% 13.00%  
Impairment charge   9,861,000                                    
Impairment charges related to property, plant and equipment   7,029,000                                  
Impairment charges related to intangible assets   2,832,000                           2,832,000        
Percentage of revenue derived from recurring revenue streams   90.00%                                  
Equity awards vesting period   4 years     2 years 4 years                          
Expected dividend rate   0.00%                                  
Excess tax benefit   $ 84,740,000 $ 81,000 $ 0                              
Debt instrument, interest rate, percentage               2.50% 2.50% 3.00% 3.00% 4.75% 4.75% 2.50% 3.00%