Segment Information - Total Asset Information For Segments (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,129,114		$ 1,114,337
Capital expenditures	23,772	16,473
Racing Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	510,611		502,993
Capital expenditures	10,210	4,532
Gaming Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	372,280		382,054
Capital expenditures	9,048	3,250
Online Operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	191,165		184,638
Capital expenditures	3,528	2,306
Other Investments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	55,058		44,652
Capital expenditures	$ 986	$ 6,385