Stock Compensation (Summary Of Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Beginning Balance, Shares	1,794,000	2,060,000	2,200,000
Granted, Shares	562,000	162,000	159,000
Exercised, Shares	(297,000)	(365,000)	(48,000)
Forfeited, Shares	(23,000)	(49,000)	(2,000)
Expired, Shares	(15,000)	(14,000)	(249,000)
Outstanding, Ending Balance, Shares	2,021,000	1,794,000	2,060,000	2,200,000
Vested and expected to vest, Shares	1,961,000
Exercisable, Shares	1,333,000
Outstanding, Beginning Balance, Weighted Average Exercise Price	$ 6.57	$ 6.74	$ 6.83
Granted, Weighted Average Exercise Price	$ 10.12	$ 6.12	$ 5.67
Exercised, Weighted Average Exercise Price	$ 7.26	$ 7.48	$ 5.64
Forfeited, Weighted Average Exercise Price	$ 7.97	$ 5.56	$ 7.01
Expired, Weighted Average Exercise Price	$ 7.34	$ 6.69	$ 7.03
Outstanding, Ending Balance, Weighted Average Exercise Price	$ 7.43	$ 6.57	$ 6.74	$ 6.83
Vested and expected to vest, Weighted Average Exercise Price	$ 7.36
Exercisable, Weighted Average Exercise Price	$ 6.48
Outstanding, Weighted Average Remaining Contractual Term in years	3 years 6 months 15 days	3 years 3 months 22 days	3 years 7 months 28 days	4 years
Vested and expected to vest, Weighted Average Remaining Contractual Term in Years	3 years 5 months 16 days
Exercisable, Weighted Average Remaining Contractual Term in years	2 years 2 months 16 days
Outstanding, Aggregate Intrinsic Value	$ 8,021,000	$ 8,274,000	$ 1,225,000.0
Vested and expected to vest, Aggregate Intrinsic Value	7,938,000
Exercisable, Aggregate Intrinsic Value	$ 6,604,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares	562,000	162,000	159,000