Accumulated Other Comprehensive Income

The following table summarizes the changes in AOCI by component for the:



	Three Months Ended June 30
	2019												2018
	Unrealized Gains (Losses) on AFS Securities			Unrealized Gains (Losses) on Derivative Instruments			Defined Benefit Pension Plan			Total			Unrealized Gains (Losses) on AFS Securities			Unrealized Gains (Losses) on Derivative Instruments			Defined Benefit Pension Plan			Total
Balance, April 1	$	(441	)	$	192		$	(2,741	)	$	(2,990	)	$	(5,759	)	$	326		$	(3,223	)	$	(8,656	)
OCI before reclassifications	4,876			(127		)	—			4,749			(1,978		)	31			—			(1,947		)
Tax effect	(1,018		)	26			—			(992		)	442			(6		)	—			436
OCI, net of tax	3,858			(101		)	—			3,757			(1,536		)	25			—			(1,511		)
Balance, June 30	$	3,417		$	91		$	(2,741	)	$	767		$	(7,295	)	$	351		$	(3,223	)	$	(10,167	)



	Six Months Ended June 30
	2019												2018
	Unrealized Gains (Losses) on AFS Securities			Unrealized Gains (Losses) on Derivative Instruments			Defined Benefit Pension Plan			Total			Unrealized Gains (Losses) on AFS Securities			Unrealized Gains (Losses) on Derivative Instruments			Defined Benefit Pension Plan			Total
Balance, January 1	$	(5,200	)	$	256		$	(2,741	)	$	(7,685	)	$	391		$	230		$	(3,223	)	$	(2,602	)
OCI before reclassifications	10,830			(208		)	—			10,622			(10,035		)	153			—			(9,882		)
Tax effect	(2,213		)	43			—			(2,170		)	2,126			(32		)	—			2,094
OCI, net of tax	8,617			(165		)	—			8,452			(7,909		)	121			—			(7,788		)
Adoption of ASU 2016-01	—			—			—			—			223			—			—			223
Balance, June 30	$	3,417		$	91		$	(2,741	)	$	767		$	(7,295	)	$	351		$	(3,223	)	$	(10,167	)

Included in OCI for the three and six month periods ended June 30, 2019 and 2018 are changes in unrealized gains and losses related to auction rate money market preferred stocks. These investments, for federal income tax purposes, have no deferred federal income taxes related to unrealized gains or losses given the nature of the investments.

A summary of the components of unrealized gains on AFS securities included in OCI follows for the:



	Three Months Ended June 30
	2019								2018
	Auction Rate Money Market Preferred Stocks		All Other AFS Securities			Total			Auction Rate Money Market Preferred and Preferred Stocks		All Other AFS Securities			Total
Unrealized gains (losses) arising during the period	$	30	$	4,846		$	4,876		$	123	$	(2,101	)	$	(1,978	)
Tax effect	—		(1,018		)	(1,018		)	—		442			442
Unrealized gains (losses), net of tax	$	30	$	3,828		$	3,858		$	123	$	(1,659	)	$	(1,536	)



	Six Months Ended June 30
	2019								2018
	Auction Rate Money Market Preferred Stocks		All Other AFS Securities			Total			Auction Rate Money Market Preferred and Preferred Stocks		All Other AFS Securities			Total
Unrealized gains (losses) arising during the period	$	295	$	10,535		$	10,830		$	86	$	(10,121	)	$	(10,035	)
Tax effect	—		(2,213		)	(2,213		)	—		2,126			2,126
Unrealized gains (losses), net of tax	$	295	$	8,322		$	8,617		$	86	$	(7,995	)	$	(7,909	)