Restructuring Activities and Accrued Liabilities in the Consolidated Balance Sheets (Detail) (Other Facility [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 2,723
Assumed from acquisition	9,797
Provisions	(11,146)
Reversal of prior provision	(2,480)
Cash expenditures	18,762
Other non-cash settlement	112
Ending Balance	2,312
Employee Severance
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2,723
Assumed from acquisition	8,215
Provisions	(9,063)
Reversal of prior provision	(1,112)
Cash expenditures	16,747
Other non-cash settlement	20
Ending Balance	2,122
Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Assumed from acquisition	1,582
Provisions	(561)
Reversal of prior provision	(1,260)
Cash expenditures	601
Other non-cash settlement	92
Ending Balance	190
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0
Assumed from acquisition	0
Provisions	(1,522)
Reversal of prior provision	(108)
Cash expenditures	1,414
Other non-cash settlement	0
Ending Balance	$ 0