Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

Pension and other postretirement benefits expenses consisted of the following:

	Three months ended September 30,						Nine months ended September 30,
Pensions	2014			2013			2014			2013
Service cost	$	1,132		$	1,393		$	3,439		$	4,839
Interest cost	5,455			5,018			16,432			15,043
Expected return on plan assets	(8,476		)	(8,273		)	(25,529		)	(24,867		)
Amortization of prior service cost	152			185			486			567
Amortization of actuarial losses	2,141			4,038			6,374			12,331
Curtailment loss	—			—			219			199
Settlement loss	281			—			863			637
Special termination benefits	—			—			715			1,016
Net periodic benefit cost	$	685		$	2,361		$	2,999		$	9,765
	Three months ended September 30,						Nine months ended September 30,
Other Postretirement Benefits	2014			2013			2014			2013
Service cost	$	29		$	58		$	110		$	176
Interest cost	540			513			1,638			1,548
Amortization of prior service credit	(218		)	(223		)	(653		)	(783		)
Amortization of actuarial losses	268			241			751			762
Curtailment loss (gain)	—			—			4			(3,081		)
Net periodic benefit cost	$	619		$	589		$	1,850		$	(1,378	)