Employee Benefit Plans (Components Of Net Periodic Benefit Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Employee Benefit Plans [Abstract]
Service cost	$ 516	$ 509
Interest cost on projected benefit obligation	505	505
Expected return on plan assets	(921)	(803)
Amortization of prior service benefit	(12)	(12)
Amortization of actuarial losses	341	347
Net periodic benefit expense	$ 429	$ 546