Stock Compensation (Summary Of Stock Compensation Expenses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 3,697	$ 3,468	$ 3,376
RSA, PSA, RSU, And PSU Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	2,855	2,616	2,204
Stock Option And ESPP Option Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 842	$ 852	$ 1,172