Pension and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 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 June 30,						Six months ended June 30,
Pensions	2014			2013			2014			2013
Service cost	$	1,052		$	1,462		$	2,307		$	3,446
Interest cost	5,540			5,038			10,978			10,025
Expected return on plan assets	(8,483		)	(8,318		)	(17,053		)	(16,594		)
Amortization of prior service cost	157			179			334			382
Amortization of actuarial losses	2,270			4,218			4,232			8,293
Curtailment loss	—			—			219			199
Settlement loss	582			637			582			637
Special termination benefits	—			1,016			715			1,016
Net periodic benefit cost	$	1,118		$	4,232		$	2,314		$	7,404
	Three months ended June 30,						Six months ended June 30,
Other Postretirement Benefits	2014			2013			2014			2013
Service cost	$	29		$	41		$	81		$	118
Interest cost	540			492			1,099			1,035
Amortization of prior service credit	(218		)	(165		)	(435		)	(560		)
Amortization of actuarial losses	267			231			483			521
Curtailment loss (gain)	—			(3,081		)	4			(3,081		)
Net periodic benefit cost	$	618		$	(2,482	)	$	1,232		$	(1,967	)