Share-based Payment Arrangements (Summary of the Status of Stock Options) (Details) $ / shares in Units, $ in Thousands	12 Months Ended	36 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares
Share-based Payment Arrangements [Abstract]
Stock options, Outstanding at January 1, 2017	624,231
Stock options, Granted		0
Stock options, exercised (in shares)	(35,000)
Stock options, forfeited or expired	(182,500)
Stock options, Outstanding at December 31, 2017	406,731	406,731
Stock options, Exercisable at December 31, 2017	406,731	406,731
Weighted Average Exercise Price, Outstanding at January 1, 2017 | $ / shares	$ 9.14
Weighted Average Exercise Price, Exercised | $ / shares	6.61
Weighted Average Exercise Price, Forfeited or expired | $ / shares	12.49
Weighted Average Exercise Price, Outstanding at December 31, 2017 | $ / shares	7.85	$ 7.85
Weighted Average Exercise Price, Exercisable at December 31, 2017 | $ / shares	$ 7.85	$ 7.85
Average Remaining Contractual Term, Outstanding at December 31, 2017 (in years)	1 year 2 months 12 days
Average Remaining Contractual Term, Exercisable at December 31, 2017 (in years)	1 year 2 months 12 days
Aggregate Intrinsic Value, Outstanding at December 31, 2017 | $	$ 1,142	$ 1,142
Aggregate Intrinsic Value, Exercisable at December 31, 2017 | $	$ 1,142	$ 1,142