Employee Benefit Plans

6 Months Ended

Jun. 30, 2011

Employee Benefit Plans

Employee Benefit Plans

13. Employee Benefit Plans

The following table details the components of pension benefit costs:

	Three Months Ended June 30						Six Months Ended June 30
	2011			2010			2011			2010
	(In thousands)						(In thousands)
Service cost	$	3,926		$	4,062		$	8,245		$	7,935
Interest cost	3,996			3,790			8,127			7,911
Expected return on plan assets	(5,438		)	(5,530		)	(10,906		)	(9,696		)
Amortization of prior service cost	(142		)	43			(95		)	86
Amortization of other actuarial losses	2,235			1,161			4,374			3,566
Net benefit cost	$	4,577		$	3,526		$	9,745		$	9,802

The following table details the components of other postretirement benefit credits:

	Three Months Ended June 30						Six Months Ended June 30
	2011			2010			2011			2010
	(In thousands)						(In thousands)
Service cost	$	518		$	308		$	923		$	754
Interest cost	529			394			1,027			1,042
Amortization of prior service credits	(546		)	(679		)	(1,137		)	(1,182		)
Amortization of other actuarial gains	(952		)	(989		)	(1,550		)	(1,459		)
Net benefit credit	$	(451	)	$	(966	)	$	(737	)	$	(845	)