Notes and Other Receivables (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 25,676	$ 24,923
Notes Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	4,109	8,105
Other Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	18,348	13,606
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%