Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details Textual)

v2.4.0.6
Segment Information (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Segment Information (Textual)          
Revenues from foreign operations $ 155.8 $ 111.2 $ 405.6 $ 245.6  
Property and equipment held in foreign countries $ 123.9   $ 123.9   $ 114.8
CANADA
         
Revenue, Major Customer [Line Items]          
Percentage of total revenue which were earned in Canada 95.40% 97.40% 96.00% 98.00%