Segment Information - Total Asset Information For Segments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 1,352,261	$ 1,114,337
Capital expenditures	48,771	41,298	22,667
Racing Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	513,345	502,993
Capital expenditures	20,184	14,027	7,484
Gaming Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	535,887	382,054
Capital expenditures	13,643	14,524	7,490
Online Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	186,621	184,638
Capital expenditures	5,908	4,427	2,774
Other Investments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	116,408	44,652
Capital expenditures	$ 9,036	$ 8,320	$ 4,919