Commitments And Contingencies (Summary Of Contractual Commitments) (Details) (USD $) In Thousands	Aug. 31, 2011
Debt principal	$ 38,687
Debt interest	3,848
Operating leases	34,177
Total operating commitments	76,712
Gross lease obligations	905
Committed sublease income	(523)
Net restructuring-related commitment	382
Total commitments	77,094
Remainder of 2011 [Member]
Debt principal	579
Debt interest	529
Operating leases	2,708
Total operating commitments	3,816
Gross lease obligations	127
Committed sublease income	(91)
Net restructuring-related commitment	36
Total commitments	3,852
2012 [Member]
Debt principal	2,397
Debt interest	2,036
Operating leases	9,832
Total operating commitments	14,265
Gross lease obligations	673
Committed sublease income	(365)
Net restructuring-related commitment	308
Total commitments	14,573
2013 [Member]
Debt principal	35,711
Debt interest	1,283
Operating leases	7,452
Total operating commitments	44,446
Gross lease obligations	105
Committed sublease income	(67)
Net restructuring-related commitment	38
Total commitments	44,484
2014 [Member]
Operating leases	5,482
Total operating commitments	5,482
Total commitments	5,482
2015 [Member]
Operating leases	3,245
Total operating commitments	3,245
Total commitments	3,245
Thereafter [Member]
Operating leases	5,458
Total operating commitments	5,458
Total commitments	$ 5,458