Restructuring Plan - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended	12 Months Ended
	Dec. 31, 2012	Jun. 30, 2012 Person	Dec. 31, 2012 Person	Jun. 30, 2012
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated		41	142
Restructuring expenses	$ 217		$ 5,201	$ 2,821
ACS
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				2,712
Fiscal Year 2013 | ACS
Restructuring Cost and Reserve [Line Items]
Future restructuring expenses expected in fiscal 2013			203
Fiscal Year 2013 | ACS | 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Future restructuring expenses expected in fiscal 2013			$ 404