Pension and Post-Retirement Benefit Costs (Tables)

9 Months Ended

Sep. 30, 2014

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Components of Net Periodic Benefit Cost

Components of net periodic benefit cost are as follows:

	Three Months Ended September 30,										Nine Months Ended September 30,
	Pension						Post-retirement Healthcare				Pension						Post-retirement Healthcare
	2014			2013			2014		2013		2014			2013			2014		2013
Service cost	$	331		$	275		$	6	$	2	$	498		$	815		$	16	$	7
Interest cost	1,138			515			185		147		2,309			1,531			548		442
Expected return on    plan assets	(777		)	(713		)	—		—		(2,363		)	(2,140		)	—		—
Amortization of prior    service cost	74			74			13		21		223			223			38		63
Amortization of net loss	71			510			82		90		204			1,449			220		269
Net periodic benefit cost	$	837		$	661		$	286	$	260	$	871		$	1,878		$	822	$	781