Associate Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2017

Postemployment Benefits [Abstract]

Schedule of Net Periodic Benefit Cost Components of Postretirement Benefits

The following are disclosures of the net periodic benefit cost components of postretirement medical benefits measured at January 1, 2017 and 2016.

	Three months ended March 31,
(Dollars in thousands)	2017			2016
Service cost	$	15		$	15
Interest cost	19			19
Prior service cost amortization	(19		)	(7		)
Net gain recognition	(16		)	(15		)
Net periodic benefit cost	$	(1	)	$	12

The following table shows the net periodic benefit cost components for the Alliance Associate Pension Plan benefits measured at January 1, 2017.

(Dollars in thousands)	Three months ended March 31, 2017
Service cost	$	10
Interest cost	75
Expected Return on Plan Assets	(135		)
Prior service cost amortization	—
Net gain recognition	—
Net periodic benefit cost	$	(50	)