Charges Related To Restructuring Activities - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]                          
Charges $ (1,148,000) $ (508,000) $ (689,000) $ (102,000) $ (1,031,000) $ (689,000) $ (240,000) $ (2,447,000) $ (1,971,000) $ (11,112,000) $ (9,336,000) $ (11,395,000) $ (10,534,000)
Payments               $ (2,992,000) (3,723,000) (11,131,000) (11,844,000) (9,381,000) (5,555,000)
Expected payout period               12 months          
Severance                          
Restructuring Cost and Reserve [Line Items]                          
Charges               $ (1,962,000) (1,678,000) (9,841,000) (8,282,000) (6,775,000) (8,352,000)
Payments               (2,390,000) (3,410,000) (9,618,000) (9,507,000) (6,469,000) (3,447,000)
Lease Terminations                          
Restructuring Cost and Reserve [Line Items]                          
Charges               (485,000) (293,000) (15,000) (698,000) (1,725,000) (1,788,000)
Payments               (602,000) (313,000) (227,000) (1,824,000) (174,000) (1,714,000)
Other                          
Restructuring Cost and Reserve [Line Items]                          
Charges               0 0 (1,286,000) (356,000) (2,404,000) (117,000)
Payments               0 0 (1,286,000) (362,000) (2,398,000) (117,000)
Inventory                          
Restructuring Cost and Reserve [Line Items]                          
Charges               0 0 0 0 (491,000) (277,000)
Payments               0 0 0 (151,000) (340,000) (277,000)
Europe                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 (510,000) (1,052,000) (1,640,000) (2,093,000) (5,466,000)
Payments               (312,000) (619,000) (1,720,000) (1,146,000) (3,314,000) (3,650,000)
Europe | Severance                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 (510,000) (527,000) (1,640,000) (817,000) (3,288,000)
Payments               (312,000) (619,000) (1,195,000) (1,146,000) (1,964,000) (1,546,000)
Europe | Lease Terminations                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 0 0 0 (53,000) (1,788,000)
Payments               0 0 0 0 (127,000) (1,714,000)
Europe | Other                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 0 (525,000) 0 (1,223,000) (113,000)
Payments               0 0 (525,000) 0 (1,223,000) (113,000)
Europe | Inventory                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 0 0 0 0 (277,000)
Payments               0 0 0 0 0 (277,000)
Asia/Pacific                          
Restructuring Cost and Reserve [Line Items]                          
Charges               (100,000) (27,000) (754,000) (1,507,000) (5,020,000) (186,000)
Payments               (100,000) (284,000) (996,000) (3,659,000) (2,369,000) (186,000)
Asia/Pacific | Severance                          
Restructuring Cost and Reserve [Line Items]                          
Charges               (100,000) (26,000) (769,000) (970,000) (1,681,000) (186,000)
Payments               (100,000) (26,000) (769,000) (1,839,000) (812,000) (186,000)
Asia/Pacific | Lease Terminations                          
Restructuring Cost and Reserve [Line Items]                          
Charges               0 (1,000) (15,000) (534,000) (1,667,000) 0
Payments               0 (258,000) (227,000) (1,660,000) (42,000) 0
Asia/Pacific | Other                          
Restructuring Cost and Reserve [Line Items]                          
Charges               0 0 0 (3,000) (1,181,000) 0
Payments               0 0 0 (9,000) (1,175,000) 0
Asia/Pacific | Inventory                          
Restructuring Cost and Reserve [Line Items]                          
Charges               0 0 0 0 (491,000) 0
Payments               0 0 0 (151,000) (340,000) 0
North America/HME                          
Restructuring Cost and Reserve [Line Items]                          
Charges               (2,347,000) (1,361,000) (4,404,000) (5,922,000) (4,247,000) (4,759,000)
Payments               (2,343,000) (1,124,000) (6,547,000) (6,864,000) (3,592,000) (1,667,000)
North America/HME | Severance                          
Restructuring Cost and Reserve [Line Items]                          
Charges               (1,862,000) (1,069,000) (4,404,000) (5,405,000) (4,242,000) (4,755,000)
Payments               (1,741,000) (1,069,000) (6,547,000) (6,347,000) (3,587,000) (1,663,000)
North America/HME | Lease Terminations                          
Restructuring Cost and Reserve [Line Items]                          
Charges               (485,000) (292,000) 0 (164,000) (5,000) 0
Payments               (602,000) (55,000) 0 (164,000) (5,000) 0
North America/HME | Other                          
Restructuring Cost and Reserve [Line Items]                          
Charges               0 0 0 (353,000) 0 (4,000)
Payments               0 0 0 (353,000) 0 (4,000)
North America/HME | Inventory                          
Restructuring Cost and Reserve [Line Items]                          
Charges               0 0 0 0 0 0
Payments               0 0 0 0 0 0
Other                          
Restructuring Cost and Reserve [Line Items]                          
Charges                   (2,978,000)      
Payments               (237,000) (1,475,000)        
Other | Severance                          
Restructuring Cost and Reserve [Line Items]                          
Charges                   (2,978,000)      
Payments               (237,000) (1,475,000)        
Other | Lease Terminations                          
Restructuring Cost and Reserve [Line Items]                          
Charges                   0      
Payments               0 0        
Other | Other                          
Restructuring Cost and Reserve [Line Items]                          
Charges                   0      
Payments               0 0        
Other | Inventory                          
Restructuring Cost and Reserve [Line Items]                          
Charges                   0      
Payments               $ 0 0        
Institutional Products Group                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 (73,000) (1,924,000) (267,000) (35,000) (123,000)
Payments                 (221,000) (1,868,000) (175,000) (106,000) (52,000)
Institutional Products Group | Severance                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 (73,000) (1,163,000) (267,000) (35,000) (123,000)
Payments                 (221,000) (1,107,000) (175,000) (106,000) (52,000)
Institutional Products Group | Lease Terminations                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 0 0 0 0 0
Payments                 0 0 0 0 0
Institutional Products Group | Other                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 0 (761,000) 0 0 0
Payments                 0 (761,000) 0 0 0
Institutional Products Group | Inventory                          
Restructuring Cost and Reserve [Line Items]                          
Charges                 0 0 0 0 0
Payments                 $ 0 $ 0 $ 0 $ 0 $ 0