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Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Jun. 30, 2012
Capital Lease Obligations [Abstract]    
Six months ending June 30, 2013 $ 2,263  
Fiscal year ending June 30, 2014 3,841  
Fiscal year ending June 30, 2015 3,760  
Fiscal year ending June 30, 2016 3,444  
Fiscal year ending June 30, 2017 1,519  
Thereafter 980  
Total minimum lease payments 15,807  
Less: imputed interest (0.82% to 10.7%) (1,663)  
Present value of future minimum lease payments 14,144  
Less: current portion 3,527 3,737
Long-term capital lease obligations 10,617 12,130
Operating Lease Obligations [Abstract]    
Six months ending June 30, 2013 2,002  
Fiscal year ending June 30, 2014 3,562  
Fiscal year ending June 30, 2015 2,927  
Fiscal year ending June 30, 2016 1,998  
Fiscal year ending June 30, 2017 1,367  
Thereafter 2,047  
Operating Lease Obligations 13,903  
Minimum
   
Capital Lease Obligations [Abstract]    
Imputed interest 0.82%  
Maximum
   
Capital Lease Obligations [Abstract]    
Imputed interest 10.70%  
Pension Plan Obligations
   
Operating Lease Obligations [Abstract]    
Defined Benefit Plans, Expected Future Minimum Payments, Remainder Of Fiscal Year 3,182  
Pension Plan and Other Postretirement Benefit Plan Obligations [Abstract]    
Fiscal year ending June 30, 2014 6,508  
Fiscal year ending June 30, 2015 6,692  
Fiscal year ending June 30, 2016 6,898  
Fiscal year ending June 30, 2017 7,165  
Thereafter 40,943  
Pension Plan and Post Retirement Benefit Obligations 71,388  
Postretirement Benefits Other Than Pension Plans
   
Operating Lease Obligations [Abstract]    
Defined Benefit Plans, Expected Future Minimum Payments, Remainder Of Fiscal Year 682  
Pension Plan and Other Postretirement Benefit Plan Obligations [Abstract]    
Fiscal year ending June 30, 2014 1,450  
Fiscal year ending June 30, 2015 1,846  
Fiscal year ending June 30, 2016 2,106  
Fiscal year ending June 30, 2017 2,362  
Thereafter 15,559  
Pension Plan and Post Retirement Benefit Obligations 24,005  
Revolving Credit Facility
   
Revolving Credit Facility Obligations [Abstract]    
Six months ending June 30, 2013 15,074  
Fiscal year ending June 30, 2014 0  
Fiscal year ending June 30, 2015 10,000  
Fiscal year ending June 30, 2016 0  
Fiscal year ending June 30, 2017 0  
Thereafter 0  
Revolving Credit Facility Obligations $ 25,074