Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended
	Oct. 31, 2011	Jun. 30, 2006	Jun. 30, 2006 Farmington Hills Claim [Member]	Mar. 31, 2012 Farmington Hills Claim [Member]	Oct. 12, 2007 Farmington Hills Claim [Member]	Jun. 30, 2006 Antioch Claim [Member]	Oct. 12, 2007 Antioch Claim [Member]
Commitments and Contingencies [Line Items]
Bankruptcy Claims, Amount of Claims Filed			$ 7,680			$ 7,727
Bankruptcy Claims Sold For Amount			5,376			5,680
Guarantee Obligation Penalty Interest Rate Per Annum		10.00%
Bankruptcy Claims, Amount of Claims Settled					6,500		7,200
Formal Claim Demand				826
Claimed Damages Not Including Interest and Expenses				1,200
Lease Termination Payment	$ 19,910