Debt securities (Tables)

3 Months Ended

Mar. 31, 2018

		At March 31, 2018
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	1,148,842	$	9	$	2,845	$	1,146,006	1.22	%
	After 1 to 5 years		2,881,995		176		49,382		2,832,789	1.69
	After 5 to 10 years		538,364		-		4,764		533,600	2.44
Total U.S. Treasury securities			4,569,201		185		56,991		4,512,395	1.66
Obligations of U.S. Government sponsored entities
	Within 1 year		319,734		29		1,176		318,587	1.33
	After 1 to 5 years		268,528		2		4,343		264,187	1.48
Total obligations of U.S. Government sponsored entities			588,262		31		5,519		582,774	1.39
Obligations of Puerto Rico, States and political subdivisions
	After 1 to 5 years		6,731		-		119		6,612	2.07
Total obligations of Puerto Rico, States and political subdivisions			6,731		-		119		6,612	2.07
Collateralized mortgage obligations - federal agencies
	Within 1 year		17		-		-		17	1.47
	After 1 to 5 years		16,648		72		111		16,609	2.90
	After 5 to 10 years		75,511		9		3,058		72,462	1.85
	After 10 years		825,468		1,723		32,646		794,545	2.05
Total collateralized mortgage obligations - federal agencies			917,644		1,804		35,815		883,633	2.04
Mortgage-backed securities
	Within 1 year		928		6		-		934	4.18
	After 1 to 5 years		11,871		134		211		11,794	3.56
	After 5 to 10 years		331,616		1,827		7,102		326,341	2.22
	After 10 years		4,222,400		15,163		142,211		4,095,352	2.45
Total mortgage-backed securities			4,566,815		17,130		149,524		4,434,421	2.44
Other
	After 5 to 10 years		748		6		-		754	3.62
Total other			748		6		-		754	3.62
Total debt securities available-for-sale^[1]		$	10,649,401	$	19,156	$	247,968	$	10,420,589	2.01	%
[1]Includes $7.0 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 $6.1 billion serve as collateral for public funds.

		At December 31, 2017
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	1,112,791	$	8	$	2,101	$	1,110,698	1.06	%
	After 1 to 5 years		2,550,116		-		26,319		2,523,797	1.55
	After 5 to 10 years		293,579		281		191		293,669	2.24
Total U.S. Treasury securities			3,956,486		289		28,611		3,928,164	1.46
Obligations of U.S. Government sponsored entities
	Within 1 year		276,304		21		818		275,507	1.26
	After 1 to 5 years		336,922		22		3,518		333,426	1.48
Total obligations of U.S. Government sponsored entities			613,226		43		4,336		608,933	1.38
Obligations of Puerto Rico, States and political subdivisions
	After 1 to 5 years		6,668		-		59		6,609	2.30
Total obligations of Puerto Rico, States and political subdivisions			6,668		-		59		6,609	2.30
Collateralized mortgage obligations - federal agencies
	Within 1 year		40		-		-		40	2.60
	After 1 to 5 years		16,972		173		75		17,070	2.90
	After 5 to 10 years		36,186		57		526		35,717	2.31
	After 10 years		914,568		2,789		26,431		890,926	2.01
Total collateralized mortgage obligations - federal agencies			967,766		3,019		27,032		943,753	2.03
Mortgage-backed securities
	Within 1 year		484		8		-		492	4.23
	After 1 to 5 years		14,599		206		211		14,594	3.50
	After 5 to 10 years		339,161		2,390		3,765		337,786	2.21
	After 10 years		4,385,368		19,493		69,071		4,335,790	2.46
Total mortgage-backed securities			4,739,612		22,097		73,047		4,688,662	2.44
Other
	After 5 to 10 years		789		13		-		802	3.62
Total other			789		13		-		802	3.62
Total debt securities available-for-sale^[1]		$	10,284,547	$	25,461	$	133,085	$	10,176,923	1.96	%
[1]Includes $6.6 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 $5.6 billion serve as collateral for public funds.

Debt Securities Available For Sale Unrealized Loss Position Fair Value [Table Text Block]

		At March 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		$	2,782,548	$	38,901	$	1,332,915	$	18,090	$	4,115,463	$	56,991
Obligations of U.S. Government sponsored entities			228,285		1,532		351,070		3,987		579,355		5,519
Obligations of Puerto Rico, States and political
	subdivisions		6,613		119		-		-		6,613		119
Collateralized mortgage obligations - federal agencies			208,888		3,646		578,882		32,169		787,770		35,815
Mortgage-backed securities			1,542,995		41,063		2,512,508		108,461		4,055,503		149,524
Total debt securities available-for-sale in an
	unrealized loss position	$	4,769,329	$	85,261	$	4,775,375	$	162,707	$	9,544,704	$	247,968

		At December 31, 2017
		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		$	2,608,473	$	14,749	$	1,027,066	$	13,862	$	3,635,539	$	28,611
Obligations of U.S. Government sponsored entities			214,670		1,108		376,807		3,228		591,477		4,336
Obligations of Puerto Rico, States and political
	subdivisions		6,609		59		-		-		6,609		59
Collateralized mortgage obligations - federal agencies			153,336		2,110		595,339		24,922		748,675		27,032
Mortgage-backed securities			1,515,295		12,529		2,652,359		60,518		4,167,654		73,047
Total debt securities available-for-sale in an
	unrealized loss position	$	4,498,383	$	30,555	$	4,651,571	$	102,530	$	9,149,954	$	133,085

Debt Securities, Held-to-maturity

		At March 31, 2018
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
Obligations of Puerto Rico, States and political subdivisions
	Within 1 year	$	3,445	$	-	$	271	$	3,174	5.98	%
	After 1 to 5 years		16,195		-		3,281		12,914	6.06
	After 5 to 10 years		26,140		-		5,588		20,552	3.62
	After 10 years		45,023		3,312		249		48,086	1.91
Total obligations of Puerto Rico, States and political subdivisions			90,803		3,312		9,389		84,726	3.30
Collateralized mortgage obligations - federal agencies
	After 5 to 10 years		66		4		-		70	5.45
Total collateralized mortgage obligations - federal agencies			66		4		-		70	5.45
Trust preferred securities
	After 5 to 10 years		1,637		-		-		1,637	8.33
	After 10 years		11,561		-		-		11,561	6.51
Total trust preferred securities			13,198		-		-		13,198	6.73
Other
	Within 1 year		250		-		-		250	2.44
	After 1 to 5 years		500		-		4		496	2.97
Total other			750		-		4		746	2.79
Total debt securities held-to-maturity^[1]		$	104,817	$	3,316	$	9,393	$	98,740	3.73	%
[1]Includes $90.8 million pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral.

		At December 31, 2017
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
Obligations of Puerto Rico, States and political subdivisions
	Within 1 year	$	3,295	$	-	$	79	$	3,216	5.96	%
	After 1 to 5 years		15,485		-		4,143		11,342	6.05
	After 5 to 10 years		29,240		-		8,905		20,335	3.89
	After 10 years		44,734		3,834		222		48,346	1.93
Total obligations of Puerto Rico, States and political subdivisions			92,754		3,834		13,349		83,239	3.38
Collateralized mortgage obligations - federal agencies
	After 5 to 10 years		67		4		-		71	5.45
Total collateralized mortgage obligations - federal agencies			67		4		-		71	5.45
Trust preferred securities
	After 5 to 10 years		1,637		-		-		1,637	8.33
	After 10 years		11,561		-		-		11,561	6.51
Total trust preferred securities			13,198		-		-		13,198	6.73
Other
	Within 1 year		500		-		7		493	1.96
	After 1 to 5 years		500		-		-		500	2.97
Total other			1,000		-		7		993	2.47
Total debt securities held-to-maturity^[1]		$	107,019	$	3,838	$	13,356	$	97,501	3.79	%
[1]Includes $92.8 million pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral.

Debt Securities Held To Maturity Unrealized Loss Position Fair Value [Table Text Block]

		At March 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
Obligations of Puerto Rico, States and political subdivisions		$	9,980	$	101	$	37,517	$	9,288	$	47,497	$	9,389
Other			250		-		496		4		746		4
Total debt securities held-to-maturity in an unrealized
	loss position	$	10,230	$	101	$	38,013	$	9,292	$	48,243	$	9,393

		At December 31, 2017
		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

Obligations of Puerto Rico, States and political subdivisions		$	-	$	-	$	35,696	$	13,349	$	35,696	$	13,349
Other			-		-		743		7		743		7
Total debt securities held-to-maturity in an unrealized
	loss position	$	-	$	-	$	36,439	$	13,356	$	36,439	$	13,356

Available For Sale Securities Member

Schedule Of Securities Aggregate Amortized Cost Exceed 10 Of Stockholders Equity [Table Text Block]

		March 31, 2018				December 31, 2017

(In thousands)	Amortized cost		Fair value		Amortized cost		Fair value
FNMA	$	3,500,042	$	3,392,654	$	3,621,537	$	3,572,474
Freddie Mac		1,279,650		1,236,594		1,358,708		1,335,685

- Definition

Tabular disclosure of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity.

+ References + Details