Share-Based Compensation (Summary Of Information Of SERP) (Details) (SERP [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended						60 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2014
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Amount of company match expensed under SERP	$ 497		$ 538		$ 560
Treasury shares issued to fund SERP expense	16		19		24		576
SERP trust account balance at December 31	35,310	[1]	31,415	[1]	24,997	[1]
Unrealized gain (loss) recorded in SERP liability account	$ 1,211		$ 3,005		$ 1,718

[1] SERP trust account investments are recorded at their fair value which is based on quoted market prices. Differences between such amounts in the table above and the deferred compensation funding asset reported on our Consolidated Balance Sheets represent the value of our Common Stock held in the Plan’s participants’ trust account and reported by us as treasury stock in our Consolidated Balance Sheets.