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Goodwill and Intangible Assets (Narrative) (Details) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended
Apr. 30, 2011
Apr. 30, 2010
Apr. 30, 2009
Apr. 30, 2011
Caturano & Company, Inc. [Member]
Jul. 20, 2010
Caturano & Company, Inc. [Member]
Apr. 30, 2011
Tax Services [Member]
Apr. 30, 2009
Tax Services [Member]
Apr. 30, 2010
Tax Services [Member]
Apr. 30, 2011
Commercial Tax Preparation Software [Member]
Apr. 30, 2010
Business Services [Member]
Apr. 30, 2011
Business Services [Member]
Apr. 30, 2009
Business Services [Member]
Amortization of intangible assets $ 29,500,000 $ 30,000,000 $ 24,900,000                  
Estimated amortization 2012 27,300,000                      
Estimated amortization 2013 22,800,000                      
Estimated amortization 2014 19,300,000                      
Estimated amortization 2015 14,500,000                      
Estimated amortization 2016 13,100,000                      
Unfavorable leasehold         (5,890,000) [1]              
Unfavorable leasehold, net       5,500,000                
Goodwill impairment 22,700,000 15,000,000       22,700,000 2,200,000   22,700,000 15,000,000    
Goodwill $ 846,245,000 $ 840,447,000 $ 850,230,000     $ 434,151,000 $ 447,591,000 $ 451,696,000 $ 14,000,000 $ 388,751,000 $ 412,094,000 $ 402,639,000
[1] Estimated life of 7 years.