Fair Value Measures (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivatives		$ 320
Foreign exchange forward contracts	20
Power hedge	742	110
Restricted stock units	1,282	130
Total	2,044	560
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivatives		0
Foreign exchange forward contracts	0
Power hedge	0	0
Restricted stock units	1,282	130
Total	1,282	130
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivatives		320
Foreign exchange forward contracts	20
Power hedge	742	110
Restricted stock units	0	0
Total	762	430
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate derivatives		0
Foreign exchange forward contracts	0
Power hedge	0	0
Restricted stock units	0	0
Total	$ 0	$ 0