Pensions And Other Employee Benefits Plans (Tables)

3 Months Ended

Mar. 31, 2012

Pensions And Other Employee Benefits Plans [Abstract]

Components Of Net Periodic Cost

	Pension Benefits Three  Months Ended March 31,						Other Benefits Three  Months Ended March 31,
	2012			2011			2012			2011
Service cost	$	3,639		$	3,048		$	152		$	181
Interest cost		6,366			6,327			763			837
Expected return on plan assets		(6,243	)		(5,813	)		—			(4	)
Amortization of net actuarial loss or (gain)		2,968			1,390			(94	)		(197	)
Amortization of prior service credits		(680	)		(679	)		(182	)		(182	)
Net periodic cost	$	6,050		$	4,273		$	639		$	635