Management Fee Revenue (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Management Fee Revenue [Line Items]
Reimbursement Revenue	$ 2.8		$ 4.2
Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Number of Table Games	32		32
Management Agreement, Term			7 years
Barley's [Member]
Management Fee Revenue [Line Items]
Property Management Fee, Percent Fee			10.00%
50% Ownership Interest [Member] | MPM Enterprises, LLC [Member]
Management Fee Revenue [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	50.00%		50.00%
Land Held for Development [Member] | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Area of Land	147		147
Grand Rapids, MI [Member] | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Distance from Major City	25		25
Kalamazoo, MI [Member] | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Distance from Major City	27		27
Maximum [Member] | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Number of Slot Machines	1,550		1,550
1st Tier [Member] | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Management Fees, Incentive Revenue			24.0
Property Management Fee Shared with Parent, Percent Fee			50.00%
2nd Tier [Member] | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Management Fees, Incentive Revenue			24.0
Property Management Fee Shared with Parent, Percent Fee			83.00%
3rd Tier [Member] | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Management Fees, Incentive Revenue			48.0
Property Management Fee Shared with Parent, Percent Fee			93.00%
Net Income [Member] (Deprecated 2013-01-31) | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Property Management Fee, Percent Fee			30.00%
MPM Enterprises, LLC [Member] | Gun Lake Tribe [Member]
Management Fee Revenue [Line Items]
Management Fees, Incentive Revenue	$ 7.8	$ 7.3	$ 16.3	$ 14.9