Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Benefits Cost

The following table shows the components of net periodic benefits cost included in expense for the plans for the periods indicated (in thousands).

	Three Months Ended September 30,
	2014			2013			2014		2013
							Other Post-
	Pension benefits						retirement Benefits
Service cost	$	3,230		$	3,969		$	31	$	52
Interest cost		4,812			4,151			285		327
Expected return on plan assets		(8,056	)		(6,982	)		—		—
Amortization of net loss		7			1,605			91		459
Net periodic benefit cost	$	(7	)	$	2,743		$	407	$	838

	Nine Months Ended September 30,
	2014			2013			2014		2013
							Other Post-
	Pension benefits						retirement Benefits
Service cost	$	9,690		$	11,905		$	94	$	162
Interest cost		14,438			12,457			855		987
Expected return on plan assets		(24,167	)		(20,946	)		—		—
Amortization of net loss		20			4,813			273		1,320
Net periodic benefit cost	$	(19	)	$	8,229		$	1,222	$	2,469