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Accrued Liabilities (Accrued Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Accrued Liabilities        
Salaries and other member benefits $ 95,031 $ 66,212    
Warranties 16,916 15,224 15,742 14,083
Interest payable 12,487 11,437    
Current portion of acquired performance obligations and unfavorable contracts 16,432 23,977    
Accrued retirement benefits 2,286 2,276    
Deferred revenues 6,108 6,304    
Taxes, other than income 8,557 6,504    
Other 14,914 29,807    
Accrued liabilities $ 172,731 $ 161,741