Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Net periodic benefit cost for both the Executive Retirement Plan and the Outside Director Plan

Net periodic benefit cost for the Executive Retirement Plan for the three years in the period ended December 31, 2017 is comprised of the following:

	Year Ended December 31,
(Dollars in thousands)	2017		2016		2015
Service cost	$	—	$	—	$	29
Interest cost	—		—		225
Amortization of prior service cost (benefit)	—		—		(198		)
Amortization of net gain	—		—		343
	—		—		399
Net loss recognized in Accumulated other comprehensive income (loss)	—		—		—
Total recognized in net periodic benefit gain and Accumulated other comprehensive income (1)	$	—	$	—	$	399

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(1) 2015 is a partial year due to the termination of the Executive Retirement Plan during the year.