The following table summarizes activity in the unrealized gain or loss on available for sale securities included in other comprehensive income (loss) for the years ended December 31, 2021, 2020 and 2019.


For the years ended December 31,	2021		2020		2019
Balance at beginning of year	$	5,009,000	$	3,657,000	$	(5,051,000)
Unrealized gains (losses) arising during the year	(8,492,000)		2,866,000		11,247,000
Reclassification of realized gains during the year	(23,000)		(1,155,000)		(224,000)
Related deferred taxes	1,788,000		(359,000)		(2,315,000)

Net change	(6,727,000)		1,352,000		8,708,000
Balance at end of year	$	(1,718,000)	$	5,009,000	$	3,657,000

The reclassification of realized gains is included in the net securities gains line of the consolidated statements of income and comprehensive income and the tax effect is included in the income tax expense line of the same statement.

The following table summarizes activity in the unrealized loss on securities transferred from available for sale to held to maturity included in other comprehensive income (loss) for the years ended December 31, 2021, 2020, and 2019.


For the years ended December 31,	2021		2020		2019
Balance at beginning of year	$	(133,000)	$	(182,000)	$	(197,000)

Amortization of net unrealized gains	58,000		62,000		19,000
Related deferred taxes	(12,000)		(13,000)		(4,000)

Net change	46,000		49,000		15,000
Balance at end of year	$	(87,000)	$	(133,000)	$	(182,000)

The following table represents the effect of the Company's derivative financial instruments included in other comprehensive income (loss) for the years ended December 31, 2021, 2020, and 2019.


For the years ended December 31,	2021		2020		2019
Balance at beginning of year	$	(4,932,000)	$	97,000	$	1,438,000
Unrealized gains (losses) on cash flow hedging derivatives arising during the year	6,243,000		(6,366,000)		(1,697,000)

Related deferred taxes	(1,311,000)		1,337,000		356,000

Net change	4,932,000		(5,029,000)		(1,341,000)
Balance at end of year	$	—	$	(4,932,000)	$	97,000

The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in other comprehensive income (loss) for the years ended December 31, 2021, 2020, and 2019:


For the years ended December 31,	2021		2020		2019
Unrecognized postretirement benefits at beginning of year	$	28,000	$	24,000	$	37,000

Change in unamortized net actuarial gain (loss)	98,000		5,000		(16,000)
Related deferred taxes	(21,000)		(1,000)		3,000

Net change	77,000		4,000		(13,000)
Unrecognized postretirement benefits at end of year	$	105,000	$	28,000	$	24,000

The reclassification of accumulated losses is a component of net periodic benefit cost (see Note 12) and the income tax effect is included in the income tax expense line of the consolidated statements of income and comprehensive income.