Fair Value Measurements - Narrative (Details)		3 Months Ended	9 Months Ended
	Jan. 31, 2014 Interest rate swaption USD ($)	Sep. 30, 2014 Interest rate swap USD ($)	Sep. 30, 2014 Interest rate swap USD ($)	Oct. 31, 2013 Interest rate swap USD ($)	Aug. 31, 2013 Interest rate swap USD ($)	May 31, 2013 Foreign exchange forward EUR (€)	Dec. 31, 2012 Foreign exchange forward	Sep. 30, 2014 Other assets Interest rate swaption USD ($)	Sep. 30, 2014 Other long-term liabilities Interest rate swap USD ($)	Sep. 30, 2014 LNS	Sep. 30, 2013 LNS
Derivatives Fair Value
Derivative notional amount	$ 150,000,000.0			$ 200,000,000.0	$ 500,000,000.0	€ 20,000,000
Derivative fixed interest rate	2.151%
Derivative premium	900,000
Gain (loss) on derivatives representing change in fair value of hedges		2,200,000	4,200,000
Derivative asset fair value								400,000
Derivative average fixed interest rate					2.151%
Basis spread on variable rate (as a percent)					1.00%
Derivative liability fair value									$ 5,700,000
Derivative weighted average forward exchange rate						1.269%	131.90%
Equity interest in derivative instrument held by Lotterie Nazionali										20.00%	20.00%