Accumulated Other Comprehensive Income (Loss) (''AOCI'') (Tables)

12 Months Ended

Dec. 31, 2016

Accumulated Other Comprehensive Income (Loss) ("AOCI")

Schedule of changes in AOCI by component

	Year Ended December 31, 2016, 2015, and 2014
			Unamortized
			Unrealized
	Unrealized		Gain on
	Gains (Losses) on		Available-
	Available-		for-Sale		Defined
	for-Sale		Securities		Benefit
	Securities		Reclassified		Pension
	and I/O		to Held-to-		Plan
	Strips		Maturity		Items		Total
	(Dollars in thousands)
Beginning balance January 1, 2016, net of taxes	$	1,090	$	403	$	(7,713)	$	(6,220)
Other comprehensive (loss) before reclassification, net of taxes		(992)		—		(106)		(1,098)
Amounts reclassified from other comprehensive income (loss), net of taxes		(638)		(67)		109		(596)
Net current period other comprehensive income (loss), net of taxes		(1,630)		(67)		3		(1,694)
Ending balance December 31, 2016, net of taxes	$	(540)	$	336	$	(7,710)	$	(7,914)
Beginning balance January 1, 2015, net of taxes	$	3,666	$	435	$	(5,952)	$	(1,851)
Other comprehensive (loss) before reclassification, net of taxes		(2,204)		—		(1,919)		(4,123)
Amounts reclassified from other comprehensive income (loss), net of taxes		(372)		(32)		158		(246)
Net current period other comprehensive loss, net of taxes		(2,576)		(32)		(1,761)		(4,369)
Ending balance December 31, 2015, net of taxes	$	1,090	$	403	$	(7,713)	$	(6,220)
Beginning balance January 1, 2014, net of taxes	$	(430)	$	466	$	(4,065)	$	(4,029)
Other comprehensive income (loss) before reclassification, net of taxes		4,152		—		(1,910)		2,242
Amounts reclassified from other comprehensive income (loss), net of taxes		(56)		(31)		23		(64)
Net current period other comprehensive income (loss), net of taxes		4,096		(31)		(1,887)		2,178
Ending balance December 31, 2014, net of taxes	$	3,666	$	435	$	(5,952)	$	(1,851)

Schedule of reclassifications out of AOCI into net income

	Amounts Reclassified from
	AOCI(1)
	Year Ended December 31, 2016						Affected Line Item Where
Details About AOCI Components	2016		2015		2014		Net Income is Presented
	(Dollars in thousands)
Unrealized gains on available-for-sale securities and I/O strips	$	1,099	$	642	$	97	Gain on sales of securities
		(461)		(270)		(41)	Income tax expense
		638		372		56	Net of tax
Amortization of unrealized gain on securities available-for-sale
that were reclassified to securities held-to-maturity		116		55		54	Interest income on taxable securities
		(49)		(23)		(23)	Income tax expense
		67		32		31	Net of tax
Amortization of defined benefit pension plan items(1)
Prior service cost		—		—		—
Prior transition obligation		51		113		102
Actuarial losses		(239)		(386)		(142)
		(188)		(273)		(40)	Income before income tax
		79		115		17	Income tax benefit
		(109)		(158)		(23)	Net of tax
Total reclassification from AOCI for the year	$	596	$	246	$	64

This AOCI component is included in the computation of net periodic benefit cost (see Note 14 — Benefit Plans).