Charges Related To Restructuring Activities (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 5,639,000	$ 3,201,000	$ 2,169,000		$ 2,169,000
Charges	703,000	4,987,000	3,283,000	$ 508,000	8,973,000	$ 1,299,000
Payments	(3,432,000)	(2,549,000)	(2,251,000)	(2,190,000)	(8,232,000)
Ending Balance	2,910,000	5,639,000	3,201,000		2,910,000
Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	5,156,000	3,030,000	2,049,000		2,049,000
Charges	792,000	4,486,000	3,136,000
Payments	(3,134,000)	(2,360,000)	(2,155,000)
Ending Balance	2,814,000	5,156,000	3,030,000		2,814,000
Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	483,000	171,000	120,000		120,000
Charges		501,000	147,000
Payments	(298,000)	(189,000)	(96,000)
Ending Balance	96,000	483,000	171,000		96,000
NA/HME
Restructuring Reserve [Roll Forward]
Beginning Balance	3,938,000	1,561,000	903,000		903,000
Charges		3,928,000	2,242,000	$ 490,000	6,000,000	1,213,000
Payments	(2,330,000)	(1,551,000)	(1,584,000)
Ending Balance	1,438,000	3,938,000	1,561,000		1,438,000
NA/HME | Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	3,455,000	1,390,000	783,000		783,000
Charges		3,427,000	2,095,000		5,441,000	808,000
Payments	(2,032,000)	(1,362,000)	(1,488,000)
Ending Balance	1,342,000	3,455,000	1,390,000		1,342,000
NA/HME | Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	483,000	171,000	120,000		120,000
Charges		501,000	147,000		559,000	$ 405,000
Payments	(298,000)	(189,000)	(96,000)
Ending Balance	96,000	483,000	171,000		96,000
Europe
Restructuring Reserve [Roll Forward]
Beginning Balance		500,000
Payments	(916,000)	(340,000)	(190,000)
Ending Balance			500,000
Europe | Severance
Restructuring Reserve [Roll Forward]
Beginning Balance		500,000
Charges	686,000	514,000	690,000
Payments	(916,000)	(340,000)	(190,000)
Ending Balance			500,000
Europe | Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance		0
Charges	0	0	0
Payments	0	0	0
Ending Balance			0
Asia/Pacific
Restructuring Reserve [Roll Forward]
Beginning Balance	10,000	123,000
Charges	187,000	545,000
Payments	(186,000)	(658,000)	(228,000)
Ending Balance	11,000	10,000	123,000		11,000
Asia/Pacific | Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	10,000	123,000
Charges	187,000	545,000	351,000
Payments	(186,000)	(658,000)	(228,000)
Ending Balance	11,000	10,000	123,000		11,000
Asia/Pacific | Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	0	0
Charges	0	0	0
Payments	0	0	0
Ending Balance	0	0	0		0
All Other
Restructuring Reserve [Roll Forward]
Beginning Balance	1,017,000	1,017,000	1,266,000		1,266,000
Payments			(249,000)
Ending Balance	1,017,000	1,017,000	1,017,000		1,017,000
All Other | Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	1,017,000	1,017,000	1,266,000		1,266,000
Payments			(249,000)
Ending Balance	1,017,000	1,017,000	1,017,000		1,017,000
All Other | Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	0	0	0		0
Payments			0
Ending Balance	0	0	0		0
Europe [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	674,000
Ending Balance	444,000	674,000			444,000
Europe [Member] | Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	674,000
Charges	686,000	514,000	$ 690,000		1,890,000
Ending Balance	444,000	674,000			444,000
Europe [Member] | Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	0
Ending Balance	$ 0	$ 0			$ 0