Basis Of Presentation (Details) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015 USD ($) d	Sep. 30, 2014 USD ($) d	Sep. 30, 2015 USD ($) d	Sep. 30, 2014 USD ($) d	Dec. 31, 2014 USD ($)
Promotional Allowance [Line Items]
Research and development	$ 9,950	$ 0	$ 30,029	$ 0
Live Racing Days \| d	60	65	183	276
Promotional Allowances	$ 8,600	$ 8,800	$ 25,300	$ 25,400
Estimated Cost Of Providing Promotional Allowances	1,800	2,400	5,900	7,300
Customer Loyalty Program Liability, Current	1,800		1,800		$ 1,700
TwinSpires [Member]
Promotional Allowance [Line Items]
Promotional Allowances	3,700	3,600	10,300	9,800
Racing Segment [Member]
Promotional Allowance [Line Items]
Promotional Allowances	100	200	400	600
Casino Segment [Member]
Promotional Allowance [Line Items]
Promotional Allowances	$ 4,800	$ 5,000	$ 14,600	$ 15,000

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 730

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

Name:	us-gaap_ResearchAndDevelopmentExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration