Employee Benefit Plans

3 Months Ended

Mar. 31, 2015

Pension and Other Postretirement Benefit Expense [Abstract]

Employee Benefit Plans

Employee Benefit Plans

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

	Three Months Ended March 31,
	2015			2014
	(In thousands)
Service cost	$	4		$	5,924
Interest cost	3,570			4,364
Expected return on plan assets	(5,764		)	(5,978		)
Amortization of prior service costs (credits)	—			(54		)
Amortization of other actuarial losses	2,058			948
Net benefit cost	$	(132	)	$	5,204

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

	Three Months Ended March 31,
	2015			2014
	(In thousands)
Service cost	$	233		$	444
Interest cost	335			464
Amortization of prior service credits	(2,084		)	(2,501		)
Amortization of other actuarial losses (gains)	(456		)	(170		)
Net benefit credit	$	(1,972	)	$	(1,763	)