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Retirement Benefit Plans (Narrative) (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2015
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Employee
Sep. 30, 2014
USD ($)
Feb. 03, 2006
Defined_Benefit_Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Number of non-contributory defined benefit pension plans | Defined_Benefit_Plan           2
Pension expense | $   $ 11 $ (100) $ 33 $ (300)  
Supplemental Employee Retirement Plans, Defined Benefit            
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Pension expense | $   $ 150 $ 140 $ 450 420  
Requisite service period       10 years    
Percentage of final 3 year average salary in which retirement benefit is based (percentage)       20.00%    
Term of final average salary used to determine retirement benefit       3 years    
Retirement age       65 years    
Period after death or change in control benefit will be paid       90 days    
Maximum contractual term       15 years    
Retirement benefit percentage 20.00%          
Gradall Company Hourly Employees Pension Plan            
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Former employees covered by pension plan       332    
Current employees covered in the Gradall Company Hourly Employees' Pension Plan who were formerly employed by former parent (Employees)       119    
Pension expense | $       $ 0 (102)  
Gradall Company Hourly Employees Retirement Plan            
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Former employees covered by pension plan       241    
Current employees covered in the Gradall Company Hourly Employees' Pension Plan who were formerly employed by former parent (Employees)       80    
Pension expense | $       $ 33 $ (198)