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Charges Related To Restructuring Activities Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]          
Charges $ 344,000 $ 401,000 $ 4,987,000 $ 745,000 $ 8,270,000
Restructuring and Related Activities, Expected Payout Period       12 months  
Payments (1,014,000) (2,460,000)   $ (3,474,000) (4,800,000)
Severance          
Restructuring Cost and Reserve [Line Items]          
Charges 479,000 401,000      
Payments (1,043,000) (2,306,000)      
Contract Termination          
Restructuring Cost and Reserve [Line Items]          
Charges   0      
Restructuring Reserve, Accrual Adjustment (135,000)        
Payments (29,000) (154,000)      
Europe          
Restructuring Cost and Reserve [Line Items]          
Payments (232,000) (435,000)      
Europe | Severance          
Restructuring Cost and Reserve [Line Items]          
Charges 108,000        
Payments (195,000) (338,000)      
Europe | Contract Termination          
Restructuring Cost and Reserve [Line Items]          
Charges 0 0      
Payments (37,000) (97,000)      
Asia/Pacific          
Restructuring Cost and Reserve [Line Items]          
Charges 247,000 11,000      
Payments (247,000) (11,000)      
Asia/Pacific | Severance          
Restructuring Cost and Reserve [Line Items]          
Charges 247,000        
Payments (247,000) (11,000)      
Asia/Pacific | Contract Termination          
Restructuring Cost and Reserve [Line Items]          
Charges 0 0      
Payments 0 0      
NA/HME          
Restructuring Cost and Reserve [Line Items]          
Charges   97,000 3,928,000 86,000 6,170,000
Restructuring Reserve, Accrual Adjustment (11,000)        
Payments (535,000) (1,754,000)      
NA/HME | Severance          
Restructuring Cost and Reserve [Line Items]          
Charges 124,000 97,000     5,522,000
Payments (601,000) (1,697,000)      
NA/HME | Contract Termination          
Restructuring Cost and Reserve [Line Items]          
Charges   0     648,000
Restructuring Reserve, Accrual Adjustment (135,000)        
Payments 66,000 (57,000)      
Europe | Severance          
Restructuring Cost and Reserve [Line Items]          
Charges 108,000 293,000   401,000 1,204,000
All Other          
Restructuring Cost and Reserve [Line Items]          
Payments   (260,000)      
All Other | Severance          
Restructuring Cost and Reserve [Line Items]          
Payments   (260,000)      
All Other | Contract Termination          
Restructuring Cost and Reserve [Line Items]          
Payments   0      
Asia/Pacific          
Restructuring Cost and Reserve [Line Items]          
Charges $ 247,000   $ 545,000 258,000 896,000
Asia/Pacific | Severance          
Restructuring Cost and Reserve [Line Items]          
Charges   $ 11,000   $ 258,000 $ 896,000