Intangible Assets and Goodwill (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended																	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Trade name	Dec. 31, 2012 Trade name	Mar. 31, 2013 Patents	Dec. 31, 2012 Patents	Mar. 31, 2013 Customer lists	Dec. 31, 2012 Customer lists	Mar. 31, 2013 Licenses	Dec. 31, 2012 Licenses	Mar. 31, 2013 Intellectual property	Dec. 31, 2012 Intellectual property	Mar. 31, 2013 Noncompete Agreements [Member]	Dec. 31, 2012 Noncompete Agreements [Member]	Mar. 31, 2013 Lottery contracts	Dec. 31, 2012 Lottery contracts	Dec. 31, 2012 Provoloto [Member]
Intangible assets
Increase in goodwill resulting from acquisitions																		$ 230
Decrease in allowance for doubtful accounts																		230
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amount	162,407		166,253			13,887	13,741	39,694	41,471	84,229	84,852	22,673	24,268	424	421	1,500	1,500
Amortizable intangible assets, Accumulated Amortization	99,721		119,627			6,327	6,113	25,016	25,349	47,874	66,688	19,075	20,107	107	73	1,322	1,297
Amortizable intangible assets, Net Balance	62,686		46,626			7,560	7,628	14,678	16,122	36,355	18,164	3,598	4,161	317	348	178	203
Non-amortizable intangible assets
Non-amortizable intangible assets, Gross Carrying Amount				38,807	39,783
Non-amortizable intangible assets, Accumulated Amortization				2,118	2,118
Non-amortizable intangible assets, Net Balance				36,689	37,665
Total intangible assets, Gross Carrying Amount	201,214		206,036
Total intangible assets, Accumulated Amortization (Excluding Goodwill)	101,839		121,745
Total intangible assets, Net	99,375		84,291
Aggregate intangible amortization expense	$ 4,900	$ 4,000