Subsequent Event (Notes)	6 Months Ended
Jun. 30, 2013
Subsequent Events [Abstract]
Subsequent Event	NOTE 13 — SUBSEQUENT EVENTS Oxford Casino Acquisition On July 17, 2013, the Company completed its acquisition of Oxford Casino (“Oxford”) in Oxford, Maine for cash consideration of approximately $160.0 million, subject to a working capital adjustment. The transaction includes the acquisition of a 25,000-square-foot casino with approximately 790 slot machines, 22 table games and various dining facilities. The acquisition continues the Company's diversification and growth strategies to invest in assets with an expected yield on investment to enhance shareholder value. The Company financed the acquisition with borrowings under its revolving credit facility. The Company expects to complete a preliminary purchase price allocation during the third quarter of 2013. HRE Trust Fund Proceeds Under legislation enacted in 1999, the HRE Trust Fund was scheduled to receive amounts equal to 15% of the adjusted gross receipts generated by a tenth riverboat casino license to be granted in Illinois. The funds were to be distributed to racetracks in Illinois for purses as well as racetrack discretionary spending. During December 2008, the Illinois Gaming Board awarded the tenth riverboat license to a casino in Des Plaines, Illinois. This casino opened during July 2011, entitling the Illinois racing industry to receive an amount equal to 15% of the adjusted gross receipts of this casino from the gaming taxes generated by that casino, once the accumulated funds were appropriated by the state. On July 10, 2013, the Governor of Illinois signed Illinois House Bill 214 into law, providing for the release of $23.0 million of funds collected from the tenth riverboat licensee since its opening during 2011. On July 18, 2013, Arlington received $7.2 million as a partial share of the proceeds, of which $3.6 million will be designated for Arlington purses with the remaining $3.6 million to be recognized as miscellaneous other income during the three months ending September 30, 2013. On July 22, 2013, Arlington received the final $0.7 million in proceeds, which will be recognized as miscellaneous other income during the three months ended September 30, 2013. No additional proceeds related to future funds of the tenth riverboat are expected to be distributed to Illinois racetracks under the provisions of House Bill 214.

NOTE 13 — SUBSEQUENT EVENTS

Oxford Casino Acquisition

On July 17, 2013, the Company completed its acquisition of Oxford Casino (“Oxford”) in Oxford, Maine for cash consideration of approximately $160.0 million, subject to a working capital adjustment. The transaction includes the acquisition of a 25,000-square-foot casino with approximately 790 slot machines, 22 table games and various dining facilities. The acquisition continues the Company's diversification and growth strategies to invest in assets with an expected yield on investment to enhance shareholder value. The Company financed the acquisition with borrowings under its revolving credit facility. The Company expects to complete a preliminary purchase price allocation during the third quarter of 2013.

HRE Trust Fund Proceeds

Under legislation enacted in 1999, the HRE Trust Fund was scheduled to receive amounts equal to 15% of the adjusted gross receipts generated by a tenth riverboat casino license to be granted in Illinois. The funds were to be distributed to racetracks in Illinois for purses as well as racetrack discretionary spending. During December 2008, the Illinois Gaming Board awarded the tenth riverboat license to a casino in Des Plaines, Illinois. This casino opened during July 2011, entitling the Illinois racing industry to receive an amount equal to 15% of the adjusted gross receipts of this casino from the gaming taxes generated by that casino, once the accumulated funds were appropriated by the state.

On July 10, 2013, the Governor of Illinois signed Illinois House Bill 214 into law, providing for the release of $23.0 million of funds collected from the tenth riverboat licensee since its opening during 2011. On July 18, 2013, Arlington received $7.2 million as a partial share of the proceeds, of which $3.6 million will be designated for Arlington purses with the remaining $3.6 million to be recognized as miscellaneous other income during the three months ending September 30, 2013. On July 22, 2013, Arlington received the final $0.7 million in proceeds, which will be recognized as miscellaneous other income during the three months ended September 30, 2013. No additional proceeds related to future funds of the tenth riverboat are expected to be distributed to Illinois racetracks under the provisions of House Bill 214.