Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2016

Employee Benefits [Abstract]

Components of Net Periodic Benefit Cost for Postretirement Benefit Plans

The components of net periodic benefit cost for our postretirement benefit plans for the three months and six months ended June 30, 2016 and 2015 were as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
Postretirement benefits	2016			2015			2016			2015
Service cost	$	—		$	—		$	—		$	—
Interest cost		3			1			6			8
Amortization of prior service cost		(14	)		(29	)		(27	)		(58	)
Actuarial net loss		115			328			390			762
Net periodic benefit cost (credit)	$	104		$	300		$	369		$	712