Shareholders' Equity, Stock Plans and Preferred Stock (Schedule of Stock Options Outstanding and Exercisable) (Details) - Stock Options and Stock Appreciation Rights (SARs) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Prices (in dollars per share)	$ 6.97	$ 6.97
Grants Outstanding (in shares)	231
Grants Exercisable (in shares)	226
$10.21 to $11.59
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	$ 10.21
Range of Exercise Prices, upper range limit (in dollars per share)	11.59
Weighted Average Exercise Prices (in dollars per share)	$ 10.88
Grants Outstanding (in shares)	62
Intrinsic Value - Grants Outstanding	$ 3
Grants Exercisable (in shares)	57
Intrinsic Value - Grants Exercisable	$ 0
$2.37 to $6.21
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	$ 2.37
Range of Exercise Prices, upper range limit (in dollars per share)	6.21
Weighted Average Exercise Prices (in dollars per share)	$ 5.54
Grants Outstanding (in shares)	169
Intrinsic Value - Grants Outstanding	$ 822
Grants Exercisable (in shares)	169
Intrinsic Value - Grants Exercisable	$ 822