Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

Pension and Other Postretirement Benefit Expense [Abstract]

Pension Benefit Costs

The following table details the components of pension benefit costs (credits):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(In thousands)
Service cost	$	2		$	4,910		$	7		$	16,311
Interest cost	3,688			4,278			10,953			12,834
Expected return on plan assets	(5,044		)	(5,929		)	(15,275		)	(17,786		)
Curtailments	526			1,504			526			1,504
Amortization of prior service costs (credits)	—			(51		)	—			(158		)
Amortization of other actuarial losses	1,395			741			6,638			2,221
Net benefit cost	$	567		$	5,453		$	2,849		$	14,926

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(In thousands)
Service cost	$	216		$	383		$	649		$	1,267
Interest cost	321			460			964			1,381
Amortization of prior service credits	(2,084		)	(2,500		)	(6,251		)	(7,502		)
Amortization of other actuarial losses (gains)	(527		)	(191		)	(1,582		)	(571		)
Net benefit credit	$	(2,074	)	$	(1,848	)	$	(6,220	)	$	(5,425	)