Other Comprehensive Income (Loss)

(In Thousands)

Changes in the components of other comprehensive income (loss), net of tax, were as follows for the periods presented:



	Pre-Tax			Tax Expense (Benefit)			Net of Tax
Three months ended March 31, 2018
Securities available for sale:
Unrealized holding losses on securities	$	(10,609	)	$	(2,700	)	$	(7,909	)
Total securities available for sale	(10,609		)	(2,700		)	(7,909		)
Derivative instruments:
Unrealized holding gains on derivative instruments	1,151			293			858
Total derivative instruments	1,151			293			858
Defined benefit pension and post-retirement benefit plans:
Amortization of net actuarial loss recognized in net periodic pension cost	87			21			66
Total defined benefit pension and post-retirement benefit plans	87			21			66
Total other comprehensive loss	$	(9,371	)	$	(2,386	)	$	(6,985	)
Three months ended March 31, 2017
Securities available for sale:
Unrealized holding gains on securities	$	4,739		$	1,832		$	2,907
Amortization of unrealized holding gains on securities transferred to the held to maturity category	(246		)	(95		)	(151		)
Total securities available for sale	4,493			1,737			2,756
Derivative instruments:
Unrealized holding gains on derivative instruments	276			107			169
Total derivative instruments	276			107			169
Defined benefit pension and post-retirement benefit plans:
Amortization of net actuarial loss recognized in net periodic pension cost	113			44			69
Total defined benefit pension and post-retirement benefit plans	113			44			69
Total other comprehensive income	$	4,882		$	1,888		$	2,994

The accumulated balances for each component of other comprehensive income (loss), net of tax, were as follows as of the dates presented:



	March 31, 2018			December 31, 2017
Unrealized gains on securities	$	1,460		$	7,363
Non-credit related portion of other-than-temporary impairment on securities	(11,319		)	(9,313		)
Unrealized losses on derivative instruments	(137		)	(995		)
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations	(7,500		)	(7,566		)
Total accumulated other comprehensive loss	$	(17,496	)	$	(10,511	)