XML 25 R56.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-Based Compensation (Details 3) (Restricted Stock Units, Performance share units, USD $)
In Millions, except Per Share data, unless otherwise specified
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2013
Jun. 30, 2013
Sep. 30, 2013
Stock-Based Compensation      
Share-based compensation arrangement by share-based payment award, award vesting period     3 years
Reversal of cumulative compensation expense previously recognized   $ 0.4  
Valuation of awards after modification of vesting targets (in dollars per share) $ 32.92    
Non-cash compensation expense resulting from modification of awards $ 3.3    
Minimum
     
Stock-Based Compensation      
Percentage of shares that could vest if the performance threshold is achieved     50.00%
Percentage of vesting shares     0.00%
Maximum
     
Stock-Based Compensation      
Percentage of shares that could vest if the performance threshold is achieved     200.00%