Pension Plans And Other Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Pension Plans And Other Postretirement Benefit Plans [Abstract]

Components Of Net Periodic Benefit Cost

	Pension Benefits						Other Post- retirement Benefits
	2012			2011			2012			2011
Service cost	$	3,791		$	2,942		$	689		$	227
Interest cost		6,109			6,109			1,281			919
Expected return on plan assets		(6,000	)		(5,591	)		(375	)		(443	)
Transition obligation recognition		—			—			126			126
Amortization of prior service cost		75			119			(38	)		(37	)
Net loss recognition		2,757			2,105			1,312			435
Net periodic benefit cost	$	6,732		$	5,684		$	2,995		$	1,227