Share-Based Compensation Plans (Schedule of Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at the beginning of year (in shares)	682
Granted (in shares)	0	0
Exercised (in shares)	0
Forfeited or expired (in shares)	0
Outstanding at the end of year (in shares)	682
Exercisable at the end of year (in shares)	409
Outstanding at the beginning of year, Weighted-Average Exercise Price (in dollars per share)	$ 152.34
Granted, Weighted-Average Exercise Price (in dollars per share)	0
Exercised, Weighted-Average Exercise Price (in dollars per share)	0
Forfeited or Expired, Weighted-Average Exercise Price (in dollars per share)	0
Outstanding at the end of year, Weighted-Average Exercise Price (in dollars per share)	152.34
Exercisable at the end of the year, Weighted-Average Exercise Price (in dollars per share)	$ 152.34
Outstanding at the end of year, Weighted-Average Remaining Contractual Term (in years)	6 years 1 month 6 days
Exercisable at the end of year, Weighted-Average Remaining Contractual Term (in years)	6 years 1 month 6 days
Outstanding at the end of year, Aggregate Intrinsic Value	$ 0
Exercisable at the end of year, Aggregate Intrinsic Value	$ 0