Debt (Loans Payable And Current Portion of Long-Term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Loans payable and current portion of long-term debt	$ 25,739	$ 25,136
Loans Payable [Member]
Short-term Debt [Line Items]
Loans payable and current portion of long-term debt	16,494	16,360
Current Portion Of Long-Term Debt [Member]
Short-term Debt [Line Items]
Loans payable and current portion of long-term debt	$ 9,245	$ 8,776