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, 2016, 2015 and 2014.



For the years ended December 31,	2016			2015			2014
Balance at beginning of year	$	1,123,000		$	2,522,000		$	(6,591,000	)
Unrealized gains (losses) arising during the year	(2,493,000		)	(754,000		)	15,175,000
Realized gains during the year	(673,000		)	(1,399,000		)	(1,155,000		)
Related deferred taxes	1,108,000			754,000			(4,907,000		)
Net change	(2,058,000		)	(1,399,000		)	9,113,000
Balance at end of year	$	(935,000	)	$	1,123,000		$	2,522,000

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, 2016, 2015, and 2014.



For the years ended December 31,	2016			2015			2014
Balance at beginning of year	$	(112,000	)	$	(48,000	)	$	—
Net unrealized losses transferred during the year	—			—			(23,000		)
Amortization of net unrealized losses	(26,000		)	(98,000		)	(51,000		)
Related deferred taxes	9,000			34,000			26,000
Net change	(17,000		)	(64,000		)	(48,000		)
Balance at end of year	$	(129,000	)	$	(112,000	)	$	(48,000	)

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, 2016, 2015, and 2014.



For the years ended December 31,	2016			2015		2014
Balance at beginning of year	$	—		$	—	$	—
Unrealized gains on cash flow hedging derivatives arising during the year	1,790,000			—		—
Related deferred taxes	(627,000		)	—		—
Net change	1,163,000			—		—
Balance at end of year	$	1,163,000		$	—	$	—

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, 2016, 2015, and 2014:



For the years ended December 31,	2016			2015			2014
Unrecognized postretirement benefits at beginning of year	$	(156,000	)	$	(125,000	)	$	188,000
Change in unamortized net actuarial loss	84,000			(48,000		)	(481,000		)
Related deferred taxes	(30,000		)	17,000			168,000
Net change	$	54,000		$	(31,000	)	$	(313,000	)
Unrecognized postretirement benefits at end of year	$	(102,000	)	$	(156,000	)	$	(125,000	)