Litigation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Non-performance of contract | Minimum
Litigation
Penalty payable on non-achievement of certain levels of lottery sales	$ 5,000
Performance guarantee
Litigation
Surety bond	$ 4,000
Threatened litigations
Litigation
Number of other shareholders with cross indemnities and undertakings	2