Schedule II - Valuation And Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 1,419	$ 1,078	$ 6,111
Additions, Charged to Costs and Expenses	516	532	655
Additions, Charged to Other Accounts		19	130
Deductions	39	210	5,818
Balance at End of Period	$ 1,896	$ 1,419	1,078
Allowance for Notes Receivable [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period			1,592
Additions, Charged to Costs and Expenses			162
Deductions			$ 1,754