Intangible Assets and Goodwill (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amount	$ 154,600		$ 152,074
Amortizable intangible assets, Accumulated Amortization	105,993		101,774
Amortizable intangible assets, Net Balance	48,607		50,300
Non-amortizable intangible assets
Total intangible assets, Gross Carrying Amount	193,462		190,751
Total intangible assets, Accumulated Amortization (Excluding Goodwill)	108,111		103,892
Total intangible assets, Net	85,351		86,859
Aggregate intangible amortization expense	4,000	3,800
Increase in goodwill resulting from acquisitions	2,000
Decrease in Inventory Resulting from Acquisitions	2,000
Decrease in goodwill as a result of foreign currency translation	11,249
Trade name
Non-amortizable intangible assets
Non-amortizable intangible assets, Gross Carrying Amount	38,862		38,677
Non-amortizable intangible assets, Accumulated Amortization	2,118		2,118
Non-amortizable intangible assets, Net Balance	36,744		36,559
Patents
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amount	13,278		12,941
Amortizable intangible assets, Accumulated Amortization	5,472		5,260
Amortizable intangible assets, Net Balance	7,806		7,681
Customer lists
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amount	36,330		35,742
Amortizable intangible assets, Accumulated Amortization	21,804		20,511
Amortizable intangible assets, Net Balance	14,526		15,231
Licenses
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amount	79,534		78,556
Amortizable intangible assets, Accumulated Amortization	58,607		56,706
Amortizable intangible assets, Net Balance	20,927		21,850
Intellectual property
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amount	23,958		23,335
Amortizable intangible assets, Accumulated Amortization	18,889		18,102
Amortizable intangible assets, Net Balance	5,069		5,233
Lottery contracts
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amount	1,500		1,500
Amortizable intangible assets, Accumulated Amortization	1,221		1,195
Amortizable intangible assets, Net Balance	$ 279		$ 305