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

Stock-Based Compensation (Details 1)

v2.4.0.6
Stock-Based Compensation (Details 1) (AUD)
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2010
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Options outstanding Number 9,085,140 11,355,295 14,444,438
Option outstanding, Weighted average exercise price 7.59 7.40 7.44
Exercise Price One [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 5.99    
Options outstanding Number 903,250    
Option outstanding, Weighted average remaining life 2.7    
Option outstanding, Weighted average exercise price 5.99    
Option outstanding, Aggregate intrinsic value 1,526,493    
Option exercisable Number 903,250    
Option exercisable, Weighted average exercise price 5.99    
Options Exercisable, Aggregate intrinsic value 1,526,493    
Exercise Price Two [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 6.30    
Options outstanding Number 93,000    
Option outstanding, Weighted average remaining life 2.9    
Option outstanding, Weighted average exercise price 6.30    
Option outstanding, Aggregate intrinsic value 128,340    
Option exercisable Number 93,000    
Option exercisable, Weighted average exercise price 6.30    
Options Exercisable, Aggregate intrinsic value 128,340    
Exercise Price Three [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 6.38    
Options outstanding Number 1,482,235    
Option outstanding, Weighted average remaining life 5.7    
Option outstanding, Weighted average exercise price 6.38    
Option outstanding, Aggregate intrinsic value 1,926,906    
Option exercisable Number 1,482,235    
Option exercisable, Weighted average exercise price 6.38    
Options Exercisable, Aggregate intrinsic value 1,926,906    
Exercise Price Four [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 6.45    
Options outstanding Number 191,000    
Option outstanding, Weighted average remaining life 0.7    
Option outstanding, Weighted average exercise price 6.45    
Option outstanding, Aggregate intrinsic value 234,930    
Option exercisable Number 191,000    
Option exercisable, Weighted average exercise price 6.45    
Options Exercisable, Aggregate intrinsic value 234,930    
Exercise Price Five [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 7.05    
Options outstanding Number 1,479,250    
Option outstanding, Weighted average remaining life 1.7    
Option outstanding, Weighted average exercise price 7.05    
Option outstanding, Aggregate intrinsic value 931,928    
Option exercisable Number 1,479,250    
Option exercisable, Weighted average exercise price 7.05    
Options Exercisable, Aggregate intrinsic value 931,928    
Exercise Price Six [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 7.83    
Options outstanding Number 1,016,000    
Option outstanding, Weighted average remaining life 5.4    
Option outstanding, Weighted average exercise price 7.83    
Option exercisable Number 908,358    
Option exercisable, Weighted average exercise price 7.83    
Exercise Price Seven [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 8.40    
Options outstanding Number 2,027,305    
Option outstanding, Weighted average remaining life 4.6    
Option outstanding, Weighted average exercise price 8.40    
Option exercisable Number 2,027,305    
Option exercisable, Weighted average exercise price 8.40    
Exercise Price Eight [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 8.90    
Options outstanding Number 1,878,100    
Option outstanding, Weighted average remaining life 3.7    
Option outstanding, Weighted average exercise price 8.90    
Option exercisable Number 1,878,100    
Option exercisable, Weighted average exercise price 8.90    
Exercise Price Nine [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Exercise Price 9.50    
Options outstanding Number 15,000    
Option outstanding, Weighted average remaining life 3.9    
Option outstanding, Weighted average exercise price 9.50    
Option exercisable Number 15,000    
Option exercisable, Weighted average exercise price 9.50    
Exercise Price Ten [Member]
      
Outstanding and exercisable options under 2001 equity incentive plan and the LTIP      
Options outstanding Number 9,085,140    
Option outstanding, Weighted average remaining life 3.9    
Option outstanding, Weighted average exercise price 7.59    
Option outstanding, Aggregate intrinsic value 4,748,597    
Option exercisable Number 8,977,498    
Option exercisable, Weighted average exercise price 7.59    
Options Exercisable, Aggregate intrinsic value 4,748,597