Fair Value Measurements Assets and Liabilities Measured on a Non-Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Adjustments To Inventory	$ 567	$ 20,964
Valuation Adjustments To Investments In Unconsolidated Entities	0	1,029
Total losses	567	21,993
Fair Value, Inputs - Quoted Prices in Active Markets for Identical Assets, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Inventory	0	0
Investments in Unconsolidated LLCs	0	0
Total fair value measurements	0	0
Fair Value, Significant Other observable Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Inventory	0	0
Investments in Unconsolidated LLCs	0	0
Total fair value measurements	0	0
Fair Value, Significant Unobservable Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Inventory	607	43,659
Investments in Unconsolidated LLCs	0	970
Total fair value measurements	607	44,629
Total Fair Value Measurements - Non-Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Inventory	607	43,659
Investments in Unconsolidated LLCs	0	970
Total fair value measurements	$ 607	$ 44,629