Expenses by Business Segment for Restructuring Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012		Jun. 30, 2012
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		$ 5,479
Restructuring charges, provisions	217	5,201		2,821
Cash paid		(5,251)		(123)
Reversals		(278)	[1]
Restructuring liability at end period	2,648	2,648		2,698
Severance
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		5,333
Restructuring charges, provisions				2,515
Cash paid		(5,103)		(2)
Reversals		(278)	[1]
Restructuring liability at end period	2,465	2,465		2,513
Facilities And Other
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		146
Restructuring charges, provisions				306
Cash paid		(148)		(121)
Restructuring liability at end period	183	183		185
ACS
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		5,479
Restructuring charges, provisions				2,712
ACS | Severance
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		5,333
Restructuring charges, provisions				2,406
ACS | Facilities And Other
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions		146
Restructuring charges, provisions				306
MFS
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions				109
MFS | Severance
Component of Operating Other Cost and Expense [Line Items]
Restructuring charges, provisions				$ 109

[1] Reversals consist primarily of a true up for the finalization of severance agreements and unused outplacement services.