Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2013

Pension and Other Postretirement Benefits [Abstract]

Summary of Net Periodic Pension and Other Postretirement Benefit Costs

Recognized net periodic pension cost included the following components (in thousands):

	Three months ended March 31,
	2013			2012
Service cost	$	2,850		$	2,721
Interest cost		7,307			7,569
Expected return on plan assets		(9,461	)		(9,367	)
Amortization of net loss		6,774			6,245
Amortization of prior service cost		(1,168	)		(1,159	)
Total net pension cost	$	6,302		$	6,009

Recognized other postretirement benefit cost included the following components (in thousands):

	Three months ended March 31,
	2013			2012
Service cost	$	352		$	458
Interest cost		714			942
Amortization of net loss		-			81
Amortization of transition obligation		-			118
Amortization of prior service cost		(36	)		(37	)
Total other postretirement benefit cost	$	1,030		$	1,562