Native American Development - North Fork (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Development and Management Agreements, Native American [Line Items]
Native American development costs	$ 10,511,000	$ 9,619,000
North Fork Rancheria of Mono Indians (Mono) [Member]
Development and Management Agreements, Native American [Line Items]
Development fee, percent fee	4.00%
Estimated period after construction begins, facility is completed and open for business	18 months
Reimbursable advances for Native American development	25,600,000
Native American development costs	$ 10,500,000
North Fork Rancheria of Mono Indians (Mono) [Member] | Maximum [Member]
Development and Management Agreements, Native American [Line Items]
Number of Slot Machines	2,000
Number of Table Games	40
Estimated period to begin construction	48 months
Successful project completion (percentage)	75.00%
North Fork Rancheria of Mono Indians (Mono) [Member] | Minimum [Member]
Development and Management Agreements, Native American [Line Items]
Estimated period to begin construction	36 months
Successful project completion (percentage)	65.00%
North Fork Rancheria of Mono Indians (Mono) [Member] | Land Held for Development [Member]
Development and Management Agreements, Native American [Line Items]
Area of land	305