ACQUISITIONS (Details) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011
Douglas Equipment Ltd [Member]
Business Acquisition [Line Items]
Accounts receivable	$ 852
Inventory	11,831
Property, plant, and equipment	672
Other current assets	402
Intangible assets	6,697
Current liabilities	(6,159)
Net tangible and intangible assets	14,295
Purchase price	(20,095)
Goodwill	(5,800)
Goodwill tax deductible	Yes
ACRA Control Ltd [Member]
Business Acquisition [Line Items]
Accounts receivable	8,451
Inventory	6,545
Property, plant, and equipment	1,601
Other current assets	456
Intangible assets	17,069
Current liabilities	(6,831)
Deferred income taxes	(2,281)
Net tangible and intangible assets	25,010
Purchase price	(60,245)
Goodwill	(35,235)
Goodwill tax deductible	No
Predator Systems Inc [Member]
Business Acquisition [Line Items]
Accounts receivable	862
Inventory	1,856
Property, plant, and equipment	2,100
Other current assets	67
Intangible assets	4,700
Current liabilities	(190)
Net tangible and intangible assets	9,395
Purchase price	(13,503)
Goodwill	(4,108)
Goodwill tax deductible	Yes
IMR Test Labs [Member]
Business Acquisition [Line Items]
Accounts receivable	2,050
Inventory	0
Property, plant, and equipment	3,125
Other current assets	134
Intangible assets	3,830
Current liabilities	(519)
Other liabilities	1,956
Holdback	2,000
Net tangible and intangible assets	4,664
Purchase price	(18,000)
Goodwill	(13,336)
Goodwill tax deductible	Yes
BASF Surface Technologies [Member]
Business Acquisition [Line Items]
Accounts receivable	0
Inventory	1,514
Property, plant, and equipment	12,774
Other current assets	0
Intangible assets	3,000
Current liabilities	(263)
Net tangible and intangible assets	17,025
Purchase price	(20,501)
Goodwill	$ (3,476)
Goodwill tax deductible	Yes