- Summarized Statements of Operations for Unconsolidated Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments in and Advances to Affiliates [Line Items]
Total expenses	$ 33,444	$ 40,547	$ 94,647	$ 105,390
Net loss	4,190	15,333	4,410	14,628
Statements Of Operations
Investments in and Advances to Affiliates [Line Items]
Total expenses	388	372	1,170	846
Net loss	$ 388	$ 372	$ 1,170	$ 846