Debt securities available-for-sale (Tables)

3 Months Ended

Mar. 31, 2021

Investments [Abstract]

Debt Securities, Available-For-Sale

		At March 31, 2021
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	1,357,228	$	16,087	$	-	$	1,373,315	2.25	%
	After 1 to 5 years		6,089,702		209,634		7,620		6,291,716	1.72
	After 5 to 10 years		4,226,436		7,863		41,553		4,192,746	1.11
Total U.S. Treasury securities			11,673,366		233,584		49,173		11,857,777	1.56
Obligations of U.S. Government sponsored entities
	After 1 to 5 years		90		2		-		92	5.63
Total obligations of U.S. Government sponsored entities			90		2		-		92	5.63
Collateralized mortgage obligations - federal agencies
	After 1 to 5 years		1,054		11		-		1,065	2.86
	After 5 to 10 years		54,344		1,085		-		55,429	1.55
	After 10 years		273,644		7,930		104		281,470	2.04
Total collateralized mortgage obligations - federal agencies			329,042		9,026		104		337,964	1.96
Mortgage-backed securities
	Within 1 year		5,572		22		-		5,594	2.86
	After 1 to 5 years		63,882		2,892		9		66,765	2.39
	After 5 to 10 years		553,299		19,919		5		573,213	1.89
	After 10 years		10,018,263		113,577		201,840		9,930,000	1.83
Total mortgage-backed securities			10,641,016		136,410		201,854		10,575,572	1.84
Other
	After 1 to 5 years		194		10		-		204	3.62
Total other			194		10		-		204	3.62
Total debt securities available-for-sale[1]		$	22,643,708	$	379,032	$	251,131	$	22,771,609	1.69	%
[1]	Includes $17.2 billion pledged to secure government and trust deposits, assets sold under agreements to repurchase, credit facilities and loan servicing agreements that the secured parties are not permitted to sell or repledge the collateral, of which $16.0 billion serve as collateral for public funds.

		At December 31, 2020
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	4,900,055	$	16,479	$	-	$	4,916,534	0.69	%
	After 1 to 5 years		5,007,223		259,399		-		5,266,622	2.05
	After 5 to 10 years		567,367		37,517		-		604,884	1.68
Total U.S. Treasury securities			10,474,645		313,395		-		10,788,040	1.40
Obligations of U.S. Government sponsored entities
	Within 1 year		59,993		101		-		60,094	1.46
	After 1 to 5 years		90		-		-		90	5.64
Total obligations of U.S. Government sponsored entities			60,083		101		-		60,184	1.47
Collateralized mortgage obligations - federal agencies
	After 1 to 5 years		1,388		14		-		1,402	2.97
	After 5 to 10 years		61,229		1,050		-		62,279	1.56
	After 10 years		318,292		10,202		43		328,451	2.04
Total collateralized mortgage obligations - federal agencies			380,909		11,266		43		392,132	1.97
Mortgage-backed securities
	Within 1 year		5,616		56		-		5,672	2.83
	After 1 to 5 years		50,393		1,735		-		52,128	2.35
	After 5 to 10 years		454,880		20,022		6		474,896	1.91
	After 10 years		9,608,860		180,844		1,839		9,787,865	1.94
Total mortgage-backed securities			10,119,749		202,657		1,845		10,320,561	1.94
Other
	After 1 to 5 years		224		11		-		235	3.62
Total other			224		11		-		235	3.62
Total debt securities available-for-sale[1]		$	21,035,610	$	527,430	$	1,888	$	21,561,152	1.66	%
[1]	Includes $18.2 billion pledged to secure government and trust deposits, assets sold under agreements to repurchase, credit facilities and loan servicing agreements that the secured parties are not permitted to sell or repledge the collateral, of which $16.9 billion serve as collateral for public funds.

Debt Securities Available For Sale Unrealized Loss Position Fair Value

	At March 31, 2021
	Less than 12 months				12 months or more				Total
			Gross				Gross				Gross
	Fair		unrealized		Fair		unrealized		Fair		unrealized
(In thousands)	value		losses		value		losses		value		losses
U.S. Treasury securities	$	4,974,081	$	49,173	$	-	$	-	$	4,974,081	$	49,173
Collateralized mortgage obligations - federal agencies		37,475		75		1,808		29		39,283		104
Mortgage-backed securities		7,225,135		201,842		608		12		7,225,743		201,854
Total debt securities available-for-sale in an unrealized loss position	$	12,236,691	$	251,090	$	2,416	$	41	$	12,239,107	$	251,131

	At December 31, 2020
	Less than 12 months				12 months or more				Total
			Gross				Gross				Gross
	Fair		unrealized		Fair		unrealized		Fair		unrealized
(In thousands)	value		losses		value		losses		value		losses
Collateralized mortgage obligations - federal agencies	$	4,029	$	43	$	-	$	-	$	4,029	$	43
Mortgage-backed securities		886,432		1,834		555		11		886,987		1,845
Total debt securities available-for-sale in an unrealized loss position	$	890,461	$	1,877	$	555	$	11	$	891,016	$	1,888

Schedule Of Securities Aggregate Amortized Cost Exceed 10 Of Stockholders Equity

		March 31, 2021				December 31, 2020
(In thousands)	Amortized cost		Fair value		Amortized cost		Fair value
FNMA	$	2,031,853	$	2,114,358	$	2,242,121	$	2,338,897
Freddie Mac		3,787,952		3,747,196		3,616,238		3,675,679