Stock Compensation (Schedule Of Stock Grant Activity For RSUs) (Details) - Restricted Stock Units (RSUs) [Member] - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Beginning Balance, Shares	103,000	61,000	129,000
Granted, Shares	146,000	88,000	5,000
Vested, Shares	(44,000)	(36,000)	(52,000)
Forfeited, Shares	(27,000)	(10,000)	(21,000)
Unvested, Ending Balance, Shares	178,000	103,000	61,000	129,000
Vested and expected to vest, Shares	164,000
Outstanding, Weighted Average Remaining Contractual Term in Years	1 year 2 months 27 days	1 year 2 months 1 day	1 year 2 months 16 days	1 year 6 months 22 days
Vested and expected to vest, Weighted Average Remaining Contractual Term in Years	1 year 2 months 23 days
Outstanding, Aggregate Intrinsic Value	$ 3,405,000	$ 1,110,000	$ 687,000	$ 1,425,000
Vested and expected to vest, Aggregate Intrinsic Value	$ 3,132,000