Comprehensive income

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Comprehensive income

16.    Comprehensive income

The following tables display the components of other comprehensive income (loss) and amounts reclassified from accumulated other comprehensive income (loss) to net income:

	Investment			Defined Benefit						Total Amount				Income
	Securities			Plans			Other			Before Tax				Tax			Net
	(In thousands)
Balance — January 1, 2021	$	195,386		$	(650,087	)	$	369,558		$	(85,143	)		$	22,111		$	(63,032	)
Other comprehensive income before reclassifications:
Unrealized holding losses, net		(95,114	)		—			—			(95,114	)			24,870			(70,244	)
Foreign currency translation adjustment		—			—			(1,218	)		(1,218	)			356			(862	)
Unrealized losses on cash flow hedges		—			—			(32,292	)		(32,292	)			8,410			(23,882	)
Current year benefit plans gains		—			206,274			—			206,274				(54,016	)		152,258
Total other comprehensive income (loss) before    reclassifications		(95,114	)		206,274			(33,510	)		77,650				(20,380	)		57,270
Amounts reclassified from accumulated other comprehensive     income that  (increase) decrease net income:
Amortization of unrealized holding    losses on held-to-maturity securities		4,427			—			—			4,427		(a)		(1,154	)		3,273
Gains realized in net income		(8	)		—			—			(8	)	(b)		2			(6	)
Accretion of net gain on terminated cash   flow hedges		—			—			(120	)		(120	)	(c)		32			(88	)
Net yield adjustment from cash flow hedges    currently in effect		—			—			(252,397	)		(252,397	)	(a)		65,741			(186,656	)
Amortization of prior service credit		—			(4,185	)		—			(4,185	)	(d)		1,095			(3,090	)
Amortization of actuarial losses		—			87,722			—			87,722		(d)		(22,971	)		64,751
Total other comprehensive income (loss)		(90,695	)		289,811			(286,027	)		(86,911	)			22,365			(64,546	)
Balance — December 31, 2021	$	104,691		$	(360,276	)	$	83,531		$	(172,054	)		$	44,476		$	(127,578	)
Balance — January 1, 2020	$	50,701		$	(464,548	)	$	133,888		$	(279,959	)		$	73,279		$	(206,680	)
Other comprehensive income before reclassifications:
Unrealized holding gains, net		141,081			—			—			141,081				(36,498	)		104,583
Foreign currency translation adjustment		—			—			2,724			2,724				(440	)		2,284
Unrealized gains on cash flow hedges		—			—			505,042			505,042				(130,432	)		374,610
Current year benefit plans losses		—			(238,218	)		—			(238,218	)			60,208			(178,010	)
Total other comprehensive income (loss) before    reclassifications		141,081			(238,218	)		507,766			410,629				(107,162	)		303,467
Amounts reclassified from accumulated other comprehensive     income that  (increase) decrease net income:
Amortization of unrealized holding    losses on held-to-maturity securities		3,606			—			—			3,606		(a)		(966	)		2,640
Gains realized in net income		(2	)		—			—			(2	)	(b)		1			(1	)
Accretion of net gain on terminated cash   flow hedges		—			—			(125	)		(125	)	(c)		34			(91	)
Net yield adjustment from cash flow hedges    currently in effect		—			—			(271,971	)		(271,971	)	(a)		70,239			(201,732	)
Amortization of prior service credit		—			(4,181	)		—			(4,181	)	(d)		1,057			(3,124	)
Amortization of actuarial losses		—			56,860			—			56,860		(d)		(14,371	)		42,489
Total other comprehensive income (loss)		144,685			(185,539	)		235,670			194,816				(51,168	)		143,648
Balance — December 31, 2020	$	195,386		$	(650,087	)	$	369,558		$	(85,143	)		$	22,111		$	(63,032	)

	Investment			Defined Benefit						Total Amount				Income
	Securities			Plans			Other			Before Tax				Tax			Net
	(In thousands)
Balance — January 1, 2019	$	(200,107	)	$	(354,502	)	$	(14,719	)	$	(569,328	)		$	149,247		$	(420,081	)
Other comprehensive income before reclassifications:
Unrealized holding gains, net		247,411			—			—			247,411				(65,009	)		182,402
Foreign currency translation adjustment		—			—			1,381			1,381				(290	)		1,091
Unrealized gains on cash flow hedges		—			—			160,373			160,373				(42,163	)		118,210
Current year benefit plans losses		—			(126,618	)		—			(126,618	)			33,287			(93,331	)
Total other comprehensive income (loss) before    reclassifications		247,411			(126,618	)		161,754			282,547				(74,175	)		208,372
Amounts reclassified from accumulated other comprehensive     income that  (increase) decrease net income:
Amortization of unrealized holding    losses on held-to-maturity securities		3,394			—			—			3,394		(a)		(892	)		2,502
Losses realized in net income		3			—			—			3		(b)		(1	)		2
Accretion of net gain on terminated cash   flow hedges		—			—			(136	)		(136	)	(c)		36			(100	)
Net yield adjustment from cash flow hedges    currently in effect		—			—			(13,011	)		(13,011	)	(a)		3,421			(9,590	)
Amortization of prior service credit		—			(4,173	)		—			(4,173	)	(d)		1,097			(3,076	)
Amortization of actuarial losses		—			20,745			—			20,745		(d)		(5,454	)		15,291
Total other comprehensive income (loss)		250,808			(110,046	)		148,607			289,369				(75,968	)		213,401
Balance — December 31, 2019	$	50,701		$	(464,548	)	$	133,888		$	(279,959	)		$	73,279		$	(206,680	)

(a)    Included in interest income.

(b)    Included in gain (loss) on bank investment securities.

(c)    Included in interest expense.

(d)    Included in other costs of operations.

Accumulated other comprehensive income (loss), net consisted of the following:

	Investment Securities			Defined Benefit Plans			Other			Total
	(In thousands)
Balance at January 1, 2019	$	(147,526	)	$	(261,303	)	$	(11,252	)	$	(420,081	)
Net gain (loss) during 2019		184,906			(81,116	)		109,611			213,401
Balance at December 31, 2019		37,380			(342,419	)		98,359			(206,680	)
Net gain (loss) during 2020		107,222			(138,645	)		175,071			143,648
Balance at December 31, 2020		144,602			(481,064	)		273,430			(63,032	)
Net gain (loss) during 2021		(66,977	)		213,919			(211,488	)		(64,546	)
Balance at December 31, 2021	$	77,625		$	(267,145	)	$	61,942		$	(127,578	)