Share-Based Payment Arrangements (Summary of Option Activity) (Details) - Options [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding at Beginning | shares	46,685
Number of Shares, Options Converted at Acquisition | shares	20,530
Number of Shares, Exercised/Released | shares	(23,365)
Number of Shares, Expired | shares	(15,305)
Number of Shares, Outstanding at Ending | shares	28,545	46,685
Number of Shares, Exercisable at Ending | shares	28,545
Weighted Average Exercise Price, Outstanding at Beginning | $ / shares	$ 31.88
Weighted Average Exercise Price, Options Converted at Acquisition | $ / shares	46.76
Weighted Average Exercise Price, Exercised/Released | $ / shares	$ 33.06
Weighted Average Exercise Price, Expired | $ / shares	45.85
Weighted Average Exercise Price, Outstanding at Ending | $ / shares	34.11	$ 31.88
Weighted Average Exercise Price, Exercisable at Ending | $ / shares	$ 34.11
Weighted Average Remaining Contractual Term (Years)	2 years 2 months 12 days	2 years 7 months 6 days
Weighted Average Remaining Contractual Term (Years), Exercisable at Ending	2 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding at Beginning | $	$ 164
Aggregate Intrinsic Value, Exercised/Released | $	180
Aggregate Intrinsic Value, Expired | $	6
Aggregate Intrinsic Value, Outstanding at Ending | $	296	$ 164
Aggregate Intrinsic Value, Exercisable at Ending | $	$ 296