Employee Benefit Plans (Schedule Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 426	$ 391	[1]
Interest cost	513	469	[1]
Expected return on plan assets	(814)	(667)	[1]
Prior service cost	0	(35)	[1]
Recognized loss	425	467	[1]
Total	$ 550	$ 625	[1]

[1] Effective January 1, 2012, our supplemental retirement plans were amended and designated as defined contribution plans. Prior years’ operating results were restated to conform to the current year presentation. This item had no impact on previously reported net income, earnings per share, the consolidated balance sheet or cash flows.