Pension Plan and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2014

Pension Plan and Other Postretirement Benefits

Schedule of components of net periodic benefit costs for the pension plans and other postretirement benefits

	Three Months Ended September 30
	Pension Plan						Other Benefits
	2014			2013			2014			2013
Service cost	$	3,539		$	4,019		$	1,398		$	1,636
Interest cost	4,737			4,140			1,321			1,121
Expected return on plan assets	(4,091		)	(3,559		)	(832		)	(600		)
Recognized net initial APBO (1)	N/A			N/A			—			3
Amortization of prior service cost	1,527			1,542			11			21
Recognized net actuarial loss	1,002			2,404			656			961
Net periodic benefit cost	$	6,714		$	8,546		$	2,554		$	3,142

	Nine months Ended September 30
	Pension Plan						Other Benefits
	2014			2013			2014			2013
Service cost	$	11,973		$	13,335		$	4,637		$	5,025
Interest cost	14,190			12,266			3,995			3,339
Expected return on plan assets	(12,449		)	(10,689		)	(2,339		)	(1,796		)
Recognized net initial APBO (1)	N/A			N/A			—			7
Amortization of prior service cost	4,547			4,624			33			61
Recognized net actuarial loss	3,008			6,852			2,206			2,794
Net periodic benefit cost	$	21,269		$	26,388		$	8,532		$	9,430

(1) APBO - Accumulated postretirement benefit obligation