Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Details)

v2.4.0.8
Acquisitions (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Business Acquisition [Line Items]      
Acquisition of business, net of cash acquired $ (1,144) $ 0  
Goodwill 2,203,409   2,204,553
Agero, Inc. [Member]
     
Business Acquisition [Line Items]      
Acquisition of business, net of cash acquired (1,144)    
Decrease in goodwill due to working capital adjustment 1,144    
Goodwill $ 388,318