Pension And Post-Retirement Health Care Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Pension And Post-Retirement Health Care Benefit Plans [Abstract]

Summary Of Net Periodic Benefit Cost

	For the Three Months Ended March 31,
	2012			2011
Service cost—benefit earned during the period	$	241		$	192
Interest cost on projected benefit obligation		2,104			2,120
Expected return on plan assets		(2,501	)		(2,522	)
Amortization of prior service cost		44			34
Amortization of actuarial loss		1,548			485
Net periodic pension cost	$	1,436		$	309