Segment Information - Total Asset Information For Segments (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,287,813		$ 1,114,337
Capital expenditures	29,858	25,456
Racing Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	490,901		502,993
Capital expenditures	11,801	7,800
Gaming Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	535,225		382,054
Capital expenditures	11,528	6,846
Online Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	190,603		184,638
Capital expenditures	4,857	3,407
Other Investments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	71,084		44,652
Capital expenditures	$ 1,672	$ 7,403