Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2021

Stockholders Equity Note [Abstract]

Components of Accumulated Other Comprehensive Income (Loss)

	Available for Sale Securities			HTM Securities Transferred from AFS			Employee Benefit Plans			Cash Flow Hedges			Equity Method Investment			Total
(in thousands)
Balance, December 31, 2019	$	28,950		$	639		$	(101,278	)	$	17,399		$	(434	)	$	(54,724	)
Net change in unrealized loss		124,018			—			—			41,476			(197	)		165,297
Reclassification of net loss realized and included in earnings		—			—			1,232			(864	)		—			368
Amortization of unrealized net loss on securities transferred to HTM		—			(195	)		—			—			—			(195	)
Income tax expense (benefit)		28,056			(44	)		279			9,189			—			37,480
Balance, March 31, 2020	$	124,912		$	488		$	(100,325	)	$	48,822		$	(631	)	$	73,266
Balance, December 31, 2020	$	171,224		$	276		$	(125,573	)	$	39,511		$	(5,369	)	$	80,069
Net change in unrealized gain or loss		(141,800	)	—			—				(4,152	)		462			(145,490	)
Reclassification of net income or loss realized and included in earnings	—			—				1,954			(6,136	)		4,468			286
Amortization of unrealized net gain on securities transferred to HTM	—				(56	)	—			—				—			(56	)
Income tax expense (benefit)		(31,862	)		(13	)		439			(2,312	)		—			(33,748	)
Balance, March 31, 2021	$	61,286		$	233		$	(124,058	)	$	31,535		$	(439	)	$	(31,443	)

Line Items in Consolidated Income Statements Affected by Amounts Reclassified from Accumulated Other Comprehensive Income

The following table shows the line items of the consolidated statements of income affected by amounts reclassified from AOCI.

	Three Months Ended
Amount reclassified from AOCI (a)	March 31,						Affected line item on
(in thousands)	2021			2020			the statement of income
Amortization of unrealized net gain or loss or gain on securities transferred to HTM	$	56		$	195		Interest income
Tax effect		(13	)		(44	)	Income taxes
Net of tax		43			151		Net income
Amortization of defined benefit pension and post-retirement items		(1,954	)		(1,232	)	Other noninterest expense (b)
Tax effect		439			279		Income taxes
Net of tax		(1,515	)		(953	)	Net income
Reclassification of unrealized gain on cash flow hedges		6,136			1,569		Interest income
Tax effect		(1,379	)		(355	)	Income taxes
Net of tax		4,757			1,214		Net income
Reclassification of unrealized loss on equity method investment		(4,468	)		—		Noninterest income
Tax effect		—			—		Income taxes
Net of tax		(4,468	)		—		Net income
Amortization of loss on terminated cash flow hedges		—			(705	)	Interest income
Tax effect		—			159		Income taxes
Net of tax		—			(546	)	Net income
Total reclassifications, net of tax	$	(1,183	)	$	(134	)	Net income

(a) Amounts in parentheses indicate reduction in net income.

(b) These AOCI components are included in the computation of net periodic pension and post-retirement cost that is reported with other noninterest expense (see Note 10 – Retirement Plans for additional details).