Stock Compensation (Schedule Of Stock Grant Activity For PSUs) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Aggregate Intrinsic Value	$ 8,021,000	$ 8,274,000	$ 1,225,000.0
Performance Stock Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Beginning Balance, Shares	236,000	159,000
Granted, Shares	185,000	182,000
Vested, Shares	(143,000)	(99,000)
Forfeited, Shares	(21,000)	(6,000)
Unvested, Ending Balance, Shares	257,000	236,000	159,000
Vested and expected to vest, Shares	240,000
Outstanding, Weighted Average Remaining Contractual Term in Years	8 months 23 days	9 months 22 days	11 months 5 days
Vested and expected to vest, Weighted Average Remaining Contractual Term in Years	8 months 9 days
Outstanding, Aggregate Intrinsic Value	2,907,000	2,612,000	989,000
Vested and expected to vest, Aggregate Intrinsic Value	$ 2,722,000