Management Fee Revenue (Details) (USD $)			6 Months Ended	12 Months Ended		12 Months Ended			6 Months Ended		12 Months Ended				12 Months Ended			6 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 MPM Enterprises, LLC [Member]	Jun. 30, 2010 Gun Lake Tribe [Member]	Dec. 31, 2012 Gun Lake Tribe [Member]	Mar. 27, 2012 Gun Lake Tribe [Member] Table_Games Slot_Machines	Dec. 31, 2012 Gun Lake Tribe [Member] 1st Tier [Member]	Dec. 31, 2012 Gun Lake Tribe [Member] 2nd Tier [Member]	Dec. 31, 2012 Gun Lake Tribe [Member] 3rd Tier [Member]	Jun. 16, 2011 Gun Lake Tribe [Member] MPM Enterprises, LLC [Member]	Dec. 31, 2011 Gun Lake Tribe [Member] MPM Enterprises, LLC [Member]	Dec. 31, 2012 Gun Lake Tribe [Member] MPM Enterprises, LLC [Member]	Dec. 31, 2012 Gun Lake Tribe [Member] Kalamazoo, MI [Member] mi	Dec. 31, 2012 Gun Lake Tribe [Member] Grand Rapids, MI [Member] mi	Dec. 31, 2012 Gun Lake Tribe [Member] Land [Member] acre	Dec. 31, 2012 Barley's [Member]	Dec. 31, 2012 The Greens [Member]	Dec. 31, 2012 Wildfire Lanes [Member]	Jun. 30, 2010 Thunder Valley [Member]
Ownership percentage, parent	100.00%	50.00%
Area of land														147
Distance from major city												27	25
Number of slot machines					1,500
Number of table games					28
Management agreement, term				7 years
Project management fee (percentage)			30.00%												10.00%	10.00%	10.00%	24.00%
Management fee shared with parent (percentage)						50.00%	83.00%	93.00%
Management fees, value range						$ 24,000,000	$ 24,000,000	$ 48,000,000	$ 10,500,000	$ 13,200,000	$ 29,300,000