Charges Related To Restructuring Activities (Details) - USD ($)	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 4,005,000
Charges	401,000	$ 3,283,000
Payments	(2,460,000)	(2,251,000)
Ending Balance	1,946,000
Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	3,704,000
Charges	401,000
Payments	(2,306,000)
Ending Balance	1,799,000
Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	301,000
Charges	0
Payments	(154,000)
Ending Balance	147,000
NA/HME
Restructuring Reserve [Roll Forward]
Beginning Balance	2,606,000
Charges	97,000	2,242,000
Payments	(1,754,000)
Ending Balance	949,000
NA/HME \| Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	2,439,000
Charges	97,000	2,095,000
Payments	(1,697,000)
Ending Balance	839,000
NA/HME \| Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	167,000
Charges	0	147,000
Payments	(57,000)
Ending Balance	110,000
Europe
Restructuring Reserve [Roll Forward]
Beginning Balance	383,000
Payments	(435,000)
Europe \| Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	249,000
Payments	(338,000)
Europe \| Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	134,000
Charges	0
Payments	(97,000)
Asia/Pacific
Restructuring Reserve [Roll Forward]
Charges	11,000
Payments	(11,000)
Asia/Pacific \| Severance
Restructuring Reserve [Roll Forward]
Payments	(11,000)
Asia/Pacific \| Contract Termination
Restructuring Reserve [Roll Forward]
Charges	0
Payments	0
All Other
Restructuring Reserve [Roll Forward]
Beginning Balance	1,016,000
Payments	(260,000)
Ending Balance	756,000
All Other \| Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	1,016,000
Payments	(260,000)
Ending Balance	756,000
All Other \| Contract Termination
Restructuring Reserve [Roll Forward]
Beginning Balance	0
Payments	0
Ending Balance	0
Europe [Member]
Restructuring Reserve [Roll Forward]
Ending Balance	241,000
Europe [Member] \| Severance
Restructuring Reserve [Roll Forward]
Charges	293,000	$ 690,000
Ending Balance	204,000
Europe [Member] \| Contract Termination
Restructuring Reserve [Roll Forward]
Ending Balance	$ 37,000

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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