Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Capital Management and Dividends (Details)

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Capital Management and Dividends (Details)
In Millions, except Per Share data, unless otherwise specified
1 Months Ended 12 Months Ended
May 31, 2012
Mar. 31, 2013
USD ($)
Mar. 31, 2012
USD ($)
Mar. 31, 2012
AUD
May 17, 2011
Capital Management and Dividends (Textual) [Abstract]          
Percentage of stock repurchase program authorized         5.00%
Percentage of common stock acquired     0.80% 0.80%  
Aggregate number of shares acquired     3.4 3.4  
Aggregate cost of common stock     $ 19.0 19.1  
Aggregate price paid per share of common stock     $ 5.55 5.59  
Interim ordinary dividend to shareholders     $ 0.04    
Total amount of dividend     $ 17.4    
Dividend declared   $ 0.38      
Declared dividend payment date     Jul. 23, 2012 Jul. 23, 2012  
Declared dividend date of record Jun. 29, 2012