Other Long-Term Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Other Long-Term Liabilities [Abstract]
Accrued pension and postretirement benefits liability	$ 34,076	$ 7,716
Capital lease obligations	11,742	0
Acquired contract obligations	10,949	0
Retained acquisition contingencies	4,931	5,791
Asset retirement obligation	3,424	0
Other	5,681	3,717
Total	$ 70,803	$ 17,224