Stock Compensation Plans (Weighted-average remaining contractual lives of stock options outstanding) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding | shares	563
Weighted average remaining contractual term	1 year 2 months 12 days
Options outstanding - weighted average per share exercise price	$ 12
Options exercisable - number exercisable | shares	563
Options exercisable - weighted average per share exercise price	$ 12
$0.01 to $10.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding | shares	71
Weighted average remaining contractual term	2 years 1 month 6 days
Options outstanding - weighted average per share exercise price	$ 8
Options exercisable - number exercisable | shares	71
Options exercisable - weighted average per share exercise price	$ 8
Exercise price range, lower range limit	0.01
Exercise price range, upper range limit	$ 10.00
$10.01 to $20.00 [Member]
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding - number outstanding | shares	492
Weighted average remaining contractual term	9 months 18 days
Options outstanding - weighted average per share exercise price	$ 12
Options exercisable - number exercisable | shares	492
Options exercisable - weighted average per share exercise price	$ 12
Exercise price range, lower range limit	10.01
Exercise price range, upper range limit	$ 20.00