Derivative Financial Instruments (Schedule of Offsetting of Derivative Liabilities) (Details) - HSBC $ in Thousands	Sep. 30, 2018 USD ($)
Offsetting of Derivative Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 59
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets	0
Net Amounts Of Liabilities Presented in the Unaudited Condensed Consolidated Balance Sheets	59
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments	(59)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0
Net Amount	$ 0