Debt securities available-for-sale (Tables)

12 Months Ended

Dec. 31, 2019

Investments [Abstract]

Debt Securities, Available-For-Sale

		At December 31, 2019
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	5,071,201	$	3,262	$	567	$	5,073,896	1.58	%
	After 1 to 5 years		5,137,804		75,597		3,435		5,209,966	2.19
	After 5 to 10 years		1,778,568		429		6,604		1,772,393	1.70
Total U.S. Treasury securities			11,987,573		79,288		10,606		12,056,255	1.86
Obligations of U.S. Government sponsored entities
	Within 1 year		62,492		2		21		62,473	1.45
	After 1 to 5 years		60,021		-		90		59,931	1.48
Total obligations of U.S. Government sponsored entities			122,513		2		111		122,404	1.47
Obligations of Puerto Rico, States and political subdivisions
	Within 1 year		6,975		-		-		6,975	-
Total obligations of Puerto Rico, States and political subdivisions			6,975		-		-		6,975	-
Collateralized mortgage obligations - federal agencies
	Within 1 year		236		-		-		236	1.83
	After 1 to 5 years		350		1		-		351	2.16
	After 5 to 10 years		85,079		31		1,180		83,930	1.63
	After 10 years		504,391		3,640		6,373		501,658	2.08
Total collateralized mortgage obligations - federal agencies			590,056		3,672		7,553		586,175	2.02
Mortgage-backed securities
	Within 1 year		16		-		-		16	2.13
	After 1 to 5 years		36,717		852		1		37,568	3.38
	After 5 to 10 years		350,373		1,958		1,303		351,028	2.02
	After 10 years		4,447,561		60,384		20,243		4,487,702	2.60
Total mortgage-backed securities			4,834,667		63,194		21,547		4,876,314	2.57
Other
	After 1 to 5 years		341		9		-		350	3.62
Total other			341		9		-		350	3.62
Total debt securities available-for-sale[1]		$	17,542,125	$	146,165	$	39,817	$	17,648,473	2.05	%
[1]	Includes $12.2 billion pledged to secure public 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 $10.9 billion serve as collateral for public funds.

		At December 31, 2018
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	3,565,571	$	108	$	5,319	$	3,560,360	2.10	%
	After 1 to 5 years		4,483,741		13,647		35,213		4,462,175	2.25
	After 5 to 10 years		245,891		3,770		-		249,661	2.84
Total U.S. Treasury securities			8,295,203		17,525		40,532		8,272,196	2.21
Obligations of U.S. Government sponsored entities
	Within 1 year		212,951		-		1,406		211,545	1.44
	After 1 to 5 years		123,857		1		2,094		121,764	1.51
Total obligations of U.S. Government sponsored entities			336,808		1		3,500		333,309	1.47
Obligations of Puerto Rico, States and political subdivisions
	After 1 to 5 years		6,926		-		184		6,742	0.70
Total obligations of Puerto Rico, States and political subdivisions			6,926		-		184		6,742	0.70
Collateralized mortgage obligations - federal agencies
	After 1 to 5 years		749		-		7		742	1.92
	After 5 to 10 years		115,744		1		4,715		111,030	1.71
	After 10 years		638,995		1,584		23,680		616,899	2.10
Total collateralized mortgage obligations - federal agencies			755,488		1,585		28,402		728,671	2.04
Mortgage-backed securities
	Within 1 year		431		4		-		435	4.30
	After 1 to 5 years		6,762		43		1		6,804	2.74
	After 5 to 10 years		365,727		1,090		8,499		358,318	2.19
	After 10 years		3,710,731		10,679		128,189		3,593,221	2.45
Total mortgage-backed securities			4,083,651		11,816		136,689		3,958,778	2.43
Other
	After 5 to 10 years		486		2		-		488	3.62
Total other			486		2		-		488	3.62
Total debt securities available-for-sale[1]		$	13,478,562	$	30,929	$	209,307	$	13,300,184	2.25	%
[1]	Includes $8.9 billion pledged to secure public 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 $7.9 billion serve as collateral for public funds.

Schedule Of Aggregate Amortized Cost And Fair Value Of Afs By Contractual Maturity

(In thousands)		Amortized cost		Fair value
Within 1 year	$	5,140,920	$	5,143,596
After 1 to 5 years		5,235,233		5,308,166
After 5 to 10 years		2,214,020		2,207,351
After 10 years		4,951,952		4,989,360
Total debt securities available-for-sale	$	17,542,125	$	17,648,473

Schedule Of Realized Gain Loss

(In thousands)		2019		2018		2017
Gross realized gains	$	-	$	-	$	95
Gross realized losses		(20)		-		(12)
Net realized gains (losses) on sale of debt securities available-for-sale	$	(20)	$	-	$	83

Debt Securities Available For Sale Unrealized Loss Position Fair Value

	At December 31, 2019
	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	$	2,439,114	$	9,798	$	452,784	$	808	$	2,891,898	$	10,606
Obligations of U.S. Government sponsored entities		9,973		4		99,846		107		109,819		111
Collateralized mortgage obligations - federal agencies		114,603		537		310,315		7,016		424,918		7,553
Mortgage-backed securities		179,312		693		1,784,414		20,854		1,963,726		21,547
Total debt securities available-for-sale in an unrealized loss position	$	2,743,002	$	11,032	$	2,647,359	$	28,785	$	5,390,361	$	39,817

	At December 31, 2018
	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	$	3,189,007	$	4,188	$	2,607,276	$	36,343	$	5,796,283	$	40,531
Obligations of U.S. Government sponsored entities		14,847		46		318,271		3,454		333,118		3,500
Obligations of Puerto Rico, States and political subdivisions		-		-		6,742		184		6,742		184
Collateralized mortgage obligations - federal agencies		66,652		489		587,869		27,913		654,521		28,402
Mortgage-backed securities		125,872		2,280		3,478,635		134,410		3,604,507		136,690
Total debt securities available-for-sale in an unrealized loss position	$	3,396,378	$	7,003	$	6,998,793	$	202,304	$	10,395,171	$	209,307

Schedule Of Securities Aggregate Amortized Cost Exceed 10 Of Stockholders Equity

		2019				2018
(In thousands)	Amortized cost		Fair value		Amortized cost		Fair value
FNMA	$	3,113,373	$	3,129,538	$	2,999,110	$	2,901,904
Freddie Mac		1,623,116		1,638,796		1,095,855		1,058,013