Notes and Other Receivables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 28,954	$ 24,923
Notes Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	4,177	8,105
Other Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	21,558	13,606
Equity Interest Issued [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	9,600
Utilities, Rent And Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	12,000
Secured Due December 2014 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 3,219	$ 3,212
Stated interest rate (in hundredths)	6.00%