Native American Development (Details) (USD $)	12 Months Ended			6 Months Ended	11 Months Ended	1 Months Ended	6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Dec. 31, 2013	Jan. 31, 2013	Dec. 31, 2014
Development and Management Agreements, Native American [Line Items]
Native American Development Costs, Noncurrent	$ 9,619,000	$ 6,806,000			6,806,000		9,619,000
Proceeds from repayment of Native American development costs	66,048,000	0	195,779,000
North Fork Rancheria of Mono Indians (Mono) [Member]
Development and Management Agreements, Native American [Line Items]
Development Agreement, Term	7 years
Percent of net proceeds shared with government unit	15.00%
Reimbursable advances for Native American Development	24,700,000						24,700,000
Native American Development Costs, Noncurrent	9,600,000						9,600,000
Interest Rate on Reimbursable Native American Advances				10.00%	10.00%
Property Development Fee, Percent Fee	2.00%
Management agreement, term	7 years
Project management fee (percentage)	40.00%
Estimated period, after construction begins, facility is completed and open for business	18 months
North Fork Rancheria of Mono Indians (Mono) [Member] | Maximum [Member]
Development and Management Agreements, Native American [Line Items]
Estimated beginning of construction in months	48 months
Number of slot machines	2,000						2,000
Number of table games	40						40
Successful project completion (percentage)	75.00%						75.00%
North Fork Rancheria of Mono Indians (Mono) [Member] | Minimum [Member]
Development and Management Agreements, Native American [Line Items]
Estimated beginning of construction in months	36 months
Successful project completion (percentage)	65.00%						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 for project	305						305
Federated Indians of Graton Rancheria [Member]
Development and Management Agreements, Native American [Line Items]
Reimbursable advances for Native American Development		63,900,000			63,900,000
Property Development Fee, Percent Fee		2.00%
Management agreement, term	7 years
Property Development Fee, Value		8,200,000
Proceeds from repayment of Native American development costs			194,200,000
Prime Rate [Member] | North Fork Rancheria of Mono Indians (Mono) [Member]
Development and Management Agreements, Native American [Line Items]
Interest Rate Basis Spread on Variable Rate Native American Advances			1.50%			1.50%
London Interbank Offered Rate (LIBOR) [Member] | North Fork Rancheria of Mono Indians (Mono) [Member]
Development and Management Agreements, Native American [Line Items]
Interest Rate Basis Spread on Variable Rate Native American Advances							12.00%
Non-recurring [Member] | North Fork Rancheria of Mono Indians (Mono) [Member] | Maximum [Member]
Development and Management Agreements, Native American [Line Items]
Mitigation contributions	28,200,000						28,200,000
Non-recurring [Member] | North Fork Rancheria of Mono Indians (Mono) [Member] | Minimum [Member]
Development and Management Agreements, Native American [Line Items]
Mitigation contributions	13,200,000						13,200,000
Recurring [Member] | North Fork Rancheria of Mono Indians (Mono) [Member]
Development and Management Agreements, Native American [Line Items]
Mitigation contributions	$ 5,100,000						5,100,000