XML 14 R48.htm IDEA: XBRL DOCUMENT v2.4.0.6
Share-Based Compensation Arrangements (Details Textual) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Share-Based Compensation Arrangements (Textual) [Abstract]      
Share based compensation, unrecognized liability $ 2.2   $ 0.8
DSUs [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share based compensation expense 0.4    
Share-Based Compensation Arrangements (Textual) [Abstract]      
Employee Service Share-based Compensation, Cash Flow Effect, Cash Used to Settle Awards 0.2 0  
Other Deferred Compensation Arrangements, Liability, Current 0.8   0.6
Stock Appreciation Rights And Phantom Shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share based compensation expense 1.4 (0.1)  
Share-Based Compensation Arrangements (Textual) [Abstract]      
Employee Service Share-based Compensation, Cash Flow Effect, Cash Used to Settle Awards $ 1.6 $ 0.1  
Common Class A [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock price $ 8.72   $ 4.62