Stock-Based Compensation (Summary Of Stock-Based Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Pre-tax stock-based compensation expense charged against income	$ 583	[1]	$ 560	[1]
Stock Option [Member]
Pre-tax stock-based compensation expense charged against income	487		475
Restricted Stock [Member]
Pre-tax stock-based compensation expense charged against income	7		0
ESPP [Member]
Pre-tax stock-based compensation expense charged against income	$ 89		$ 85

[1] Stock-based compensation expense is recorded in the selling, general and administrative caption in our consolidated statements of comprehensive income.