Stock Compensation (Schedule Of Stock Grant Activity For RSUs) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Aggregate Intrinsic Value	$ 5,992,000	$ 8,021,000	$ 8,274,000	$ 1,225,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Beginning Balance, Shares	61,000	129,000	120,000
Granted, Shares	88,000	5,000	73,000
Vested, Shares	(36,000)	(52,000)	(54,000)
Forfeited, Shares	(10,000)	(21,000)	(10,000)
Unvested, Ending Balance, Shares	103,000	61,000	129,000	120,000
Vested and expected to vest, Shares	95,000
Outstanding, Weighted Average Remaining Contractual Term in Years	1 year 2 months 1 day	1 year 2 months 16 days	1 year 6 months 22 days	1 year 6 months 15 days
Vested and expected to vest, Weighted Average Remaining Contractual Term in Years	1 year 2 months 1 day
Outstanding, Aggregate Intrinsic Value	$ 1,110,000	$ 687,000	$ 1,425,000	$ 747,000
Vested and expected to vest, Aggregate Intrinsic Value	$ 1,029,000