The following table presents the changes in accumulated other comprehensive income (loss) by component net of tax for the three and nine month periods ended September 30, 2017 and 2016:


(Dollars in thousands)	Pretax			Tax Effect			After-tax
Three months ended September 30, 2017
Balance as of June 30, 2017	$	121		$	(43	)	$	78
Unrealized holding gain on available-for-sale securities arising during the period		(255	)		87			(168	)
Reclassify gain included in income		—			—			—
Amortization of held-to-maturity discount resulting from transfer		27			(9	)		18

Total other comprehensive income (loss)		(228	)		78			(150	)

Balance as of September 30, 2017	$	(107	)	$	35		$	(72	)


Nine months ended September 30, 2017
Balance as of December 31, 2016	$	(1,323	)	$	449		$	(874	)
Unrealized holding gain on available-for-sale securities arising during the period		1,132			(385	)		747
Reclassify gain included in income		—			—			—
Amortization of held-to-maturity discount resulting from transfer		84			(29	)		55

Total other comprehensive income (loss)		1,216			(414	)		802

Balance as of September 30, 2017	$	(107	)	$	35		$	(72	)


Three months ended September 30, 2016
Balance as of June 30, 2016	$	1,012		$	(344	)	$	668
Unrealized holding gain on available-for-sale securities arising during the period		128			(43	)		85
Reclassify gain included in income		(1	)		—			(1	)
Amortization of held-to-maturity discount resulting from transfer		175			(60	)		115

Total other comprehensive income (loss)		302			(103	)		199

Balance as of September 30, 2016	$	1,314		$	(447	)	$	867


Nine months ended September 30, 2016
Balance as of December 31, 2015	$	(631	)	$	214		$	(417	)
Unrealized holding gain on available-for-sale securities arising during the period		1,455			(494	)		961
Reclassify gain included in income		(1	)		—			(1	)
Amortization of held-to-maturity discount resulting from transfer		491			(167	)		324

Total other comprehensive income (loss)		1,945			(661	)		1,284

Balance as of September 30, 2016	$	1,314		$	(447	)	$	867