Discontinued Operations (Major Classes Of Assets And Liabilities Reported As Held-For-Sale) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2011	Apr. 30, 2011
Discontinued Operations [Abstract]
Receivables, net	$ 215,817	$ 262,118
Prepaid expenses and other current assets	61,357	67,854
Property and equipment, net	49,833	52,022
Intangible assets, net	87,324	92,579
Goodwill	299,896	412,094
Other assets	14,926	13,661
Assets held for sale	729,153	900,328
Accounts payable, accrued expenses and deposits	67,947	67,088
Accrued salaries, wages and payroll taxes	39,009	48,290
Long-term debt	10,841	13,107
Deferred tax liability	50,209	81,492
Other liabilities	31,024	31,585
Liabilities directly associated with assets held for sale	$ 199,030	$ 241,562