Special Charges (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Restructuring Cost and Reserve [Line Items]
Acquisition-related costs	$ 1,148,000	$ 1,439,000	$ 2,760,000	$ 3,335,000
Other charges	983,000	0	2,331,000	1,345,000
Special Charges [Member]
Restructuring Cost and Reserve [Line Items]
Acquisition-related costs		0		1,100,000
Acquisition-integration related costs	600,000	1,400,000	1,000,000	2,200,000
Recovery ARO [Member]
Restructuring Cost and Reserve [Line Items]
Other charges	600,000	0	1,900,000	800,000
Litigation Settlement [Member]
Restructuring Cost and Reserve [Line Items]
Other charges	400,000		400,000
Recovery Sublease [Member]
Restructuring Cost and Reserve [Line Items]
Other charges		0		600,000
Write-off of Debt Issuance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Other charges		0		2,700,000
Fiscal 2013 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Expected total restructuring costs			13,300,000
Special charges recorded to date			11,300,000
Fiscal 2012 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Special charges recorded to date			18,100,000
Acquisition of EasyLink Services International Corporation [Member] | Special Charges [Member]
Restructuring Cost and Reserve [Line Items]
Acquisition-related costs	$ 600,000		$ 1,800,000