Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 country	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Line Items]
Number of countries in which entity operates	50
Allowance for Doubtful Accounts Activity [Roll Forward]
Balance, beginning of period	$ 2,718,000	$ 5,553,000	$ 5,685,000
Expense (reversal)	473,000	(154,000)	(18,000)
Write-offs	(263,000)	(2,732,000)	(25,000)
Translation adjustments	41,000	51,000	(89,000)
Balance, end of period	2,969,000	2,718,000	5,553,000
Asset impairment charges	0	0	1,434,000
Goodwill, impairment loss	0	0
Revenue recognition, installation deferral percentage	4.00%
Research and development subsidies	5,300,000	7,300,000	5,300,000
Advertising expense	$ 4,100,000	$ 3,900,000	$ 3,200,000
Stock options, vesting period	4 years
Stock options, average legal life	7
Service Inventory [Member]
Allowance for Doubtful Accounts Activity [Roll Forward]
Post-production service lIfe	8 years
Building and Building Improvements [Member]
Allowance for Doubtful Accounts Activity [Roll Forward]
Property, plant and equipment, estimated useful life	40 years
Machinery and Equipment [Member] | Minimum [Member]
Allowance for Doubtful Accounts Activity [Roll Forward]
Property, plant and equipment, estimated useful life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Allowance for Doubtful Accounts Activity [Roll Forward]
Property, plant and equipment, estimated useful life	7 years
Demonstration Systems [Member] | Minimum [Member]
Allowance for Doubtful Accounts Activity [Roll Forward]
Property, plant and equipment, estimated useful life	3 years
Demonstration Systems [Member] | Maximum [Member]
Allowance for Doubtful Accounts Activity [Roll Forward]
Property, plant and equipment, estimated useful life	7 years
Other Fixed Assets [Member] | Minimum [Member]
Allowance for Doubtful Accounts Activity [Roll Forward]
Property, plant and equipment, estimated useful life	3 years
Other Fixed Assets [Member] | Maximum [Member]
Allowance for Doubtful Accounts Activity [Roll Forward]
Property, plant and equipment, estimated useful life	7 years