Share-Based Payment Arrangements (Schedule of Options, Grants in Period and Grant Date Intrinsic Value) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2016
Cost of share-based payments (non-cash)		$ 46	$ 228
Employee Stock Option [Member]
Intrinsic value of options exercised	$ 80	$ 101
Cost of share-based payments (non-cash)			38
Income tax benefit of share-based payments recognized in income			$ 8