Employee benefit plans

3 Months Ended

Mar. 31, 2014

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Pension and other postretirement benefit plans

Employee benefit plans

The Company has noncontributory defined benefit pension plans and other postretirement benefit plans for certain eligible employees. Components of net periodic benefit cost for the Company's pension and other postretirement benefit plans were as follows:



							Other
							Postretirement
	Pension Benefits						Benefits
Three Months Ended March 31,	2014			2013			2014			2013
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	33		$	40		$	379		$	504
Interest cost	4,440			4,018			858			940
Expected return on assets	(5,125		)	(5,083		)	(1,067		)	(1,107		)
Amortization of prior service cost (credit)	18			18			(348		)	(364		)
Amortization of net actuarial loss	1,313			1,864			318			671
Net periodic benefit cost, including amount capitalized	679			857			140			644
Less amount capitalized	95			110			29			29
Net periodic benefit cost	$	584		$	747		$	111		$	615

In addition to the qualified plan defined pension benefits reflected in the table, the Company has unfunded, nonqualified benefit plans for executive officers and certain key management employees that generally provide for defined benefit payments at age 65 following the employee's retirement or to their beneficiaries upon death for a 15-year period. The Company's net periodic benefit cost for this plan for the three months ended March 31, 2014 and 2013, was $1.7 million and $1.9 million, respectively.