Pension and Other Postretirement Benefits

3 Months Ended

Mar. 31, 2012

Compensation and Retirement Disclosure [Abstract]

Pension and Other Postretirement Benefits

Pension and Other Postretirement Benefits

Pension and other postretirement benefits expenses consisted of the following:

	Three months ended March 31,
Pensions	2012			2011
Service cost	$	1,613		$	1,569
Interest cost	5,322			5,572
Expected return on plan assets	(8,033		)	(7,900		)
Amortization of prior service cost	211			275
Recognized losses	2,759			1,332
Net periodic benefit cost	$	1,872		$	848
	Three months ended March 31,
Other Postretirement Benefits	2012			2011
Service cost	$	77		$	95
Interest cost	680			739
Amortization of prior service credit	(396		)	(286		)
Recognized losses	286			164
Net periodic benefit cost	$	647		$	712