Restructuring and Other Charges, net (Accrual Activity Relating to Restructuring and Other Charges) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Restructuring [Roll Forward]
Balance at September 30, 2013			$ 5,421
Restructuring and other charges, net	8,544	7,940	14,100	15,490
Restructuring Reserve, Accrual Adjustment			757
Cash payments			(9,618)
Balance at June 30, 2014	10,660		10,660
Personnel
Restructuring [Roll Forward]
Balance at September 30, 2013			4,230
Restructuring and other charges, net	7,804	7,787	10,897	14,415
Restructuring Reserve, Accrual Adjustment			(36)
Cash payments			(6,963)
Balance at June 30, 2014	8,128		8,128
Facilities
Restructuring [Roll Forward]
Balance at September 30, 2013			1,191
Restructuring and other charges, net	740	153	3,203	1,075
Restructuring Reserve, Accrual Adjustment			793
Cash payments			(2,655)
Balance at June 30, 2014	$ 2,532		$ 2,532