Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

Pension and other postretirement benefits expenses consisted of the following:

	Three months ended March 31,
Pensions	2014			2013
Service cost	$	1,255		$	1,984
Interest cost	5,438			4,987
Expected return on plan assets	(8,570		)	(8,276		)
Amortization of prior service cost	177			203
Amortization of actuarial losses	1,962			4,075
Curtailment loss	219			199
Special termination benefits	715			—
Net periodic benefit cost	$	1,196		$	3,172
	Three months ended March 31,
Other Postretirement Benefits	2014			2013
Service cost	$	52		$	77
Interest cost	559			543
Amortization of prior service credit	(217		)	(395		)
Amortization of actuarial losses	216			290
Curtailment loss	4			—
Net periodic benefit cost	$	614		$	515