Stock-Based Compensation and Stock Repurchases (Summary Of Repurchased Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended						36 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2016
Stock-Based Compensation and Stock Repurchases [Abstract]
Shares acquired	181,739		240,102		432,252		854,093
Share price	$ 15.68		$ 12.95		$ 9.42		$ 11.74
Total Paid	$ 2,850	[1]	$ 3,110	[1]	$ 4,070	[1]	$ 10,030

[1] Certain 2015 and 2014 balances included the restatement impact as a result of a change in accounting principle (see Note 2 - Summary of Significant Accounting Policies - Accounting Changes).