Employee Pension Benefits (Tables)

9 Months Ended

Sep. 30, 2011

Employee Pension Benefits [Abstract]

Schedule Of Components Of Net Periodic Pension Benefit Of The ESI Pension Plan And ESI Excess Pension Plan

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Interest cost		$608		$  846		$1,804		$2,286
Expected return on assets		(1,273)		(1,081)		(3,567)		(3,301)
Recognized net actuarial loss		400		684		1,352		1,438
Amortization of prior service (credit) cost		(474)		7		(1,166)		21
Net periodic pension (benefit)		($739)		$456		($1,577)		$444