Investment securities (Tables)

3 Months Ended

Mar. 31, 2017

Available For Sale Securities Text Block

		At March 31, 2017
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	944,180	$	408	$	242	$	944,346	0.98	%
	After 1 to 5 years		2,007,013		1,039		9,278		1,998,774	1.24
Total U.S. Treasury securities			2,951,193		1,447		9,520		2,943,120	1.16
Obligations of U.S. Government sponsored entities
	Within 1 year		125,028		39		46		125,021	0.97
	After 1 to 5 years		588,119		724		1,785		587,058	1.40
	After 5 to 10 years		200		3		-		203	5.64
Total obligations of U.S. Government sponsored entities			713,347		766		1,831		712,282	1.32
Obligations of Puerto Rico, States and political subdivisions
	After 1 to 5 years		6,480		-		127		6,353	2.78
	After 5 to 10 years		5,000		-		1,967		3,033	3.80
	After 10 years		17,625		-		6,102		11,523	7.09
Total obligations of Puerto Rico, States and political subdivisions			29,105		-		8,196		20,909	5.56
Collateralized mortgage obligations - federal agencies
	Within 1 year		48		-		-		48	4.00
	After 1 to 5 years		18,086		349		50		18,385	2.87
	After 5 to 10 years		35,328		354		59		35,623	2.67
	After 10 years		1,111,730		5,130		24,030		1,092,830	1.99
Total collateralized mortgage obligations - federal agencies			1,165,192		5,833		24,139		1,146,886	2.02
Mortgage-backed securities
	Within 1 year		49		-		-		49	4.73
	After 1 to 5 years		18,205		441		77		18,569	3.80
	After 5 to 10 years		333,619		3,071		2,324		334,366	2.23
	After 10 years		4,049,014		27,557		66,499		4,010,072	2.48
Total mortgage-backed securities			4,400,887		31,069		68,900		4,363,056	2.46
Equity securities (without contractual maturity)			1,026		833		-		1,859	8.13
Other
	Within 1 year		8,445		9		-		8,454	1.86
	After 5 to 10 years		935		26		-		961	3.62
Total other			9,380		35		-		9,415	2.04
Total investment securities available-for-sale^[1]		$	9,270,130	$	39,983	$	112,586	$	9,197,527	1.91	%
[1]Includes $4.9 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 $4.2 billion serve as collateral for public funds.

		At December 31, 2016
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	844,002	$	1,254	$	28	$	845,228	1.00	%
	After 1 to 5 years		1,300,729		214		9,551		1,291,392	1.11
Total U.S. Treasury securities			2,144,731		1,468		9,579		2,136,620	1.06
Obligations of U.S. Government sponsored entities
	Within 1 year		100,050		102		-		100,152	0.98
	After 1 to 5 years		613,293		710		2,505		611,498	1.38
	After 5 to 10 years		200		-		-		200	5.64
Total obligations of U.S. Government sponsored entities			713,543		812		2,505		711,850	1.32
Obligations of Puerto Rico, States and political subdivisions
	After 1 to 5 years		6,419		-		161		6,258	2.89
	After 5 to 10 years		5,000		-		1,550		3,450	3.80
	After 10 years		17,605		-		4,542		13,063	7.09
Total obligations of Puerto Rico, States and political subdivisions			29,024		-		6,253		22,771	5.60
Collateralized mortgage obligations - federal agencies
	Within 1 year		13		-		-		13	1.23
	After 1 to 5 years		18,524		429		28		18,925	2.89
	After 5 to 10 years		39,178		428		61		39,545	2.68
	After 10 years		1,180,686		6,313		23,956		1,163,043	1.99
Total collateralized mortgage obligations - federal agencies			1,238,401		7,170		24,045		1,221,526	2.02
Mortgage-backed securities
	Within 1 year		55		1		-		56	4.76
	After 1 to 5 years		19,960		537		43		20,454	3.86
	After 5 to 10 years		317,185		3,701		1,721		319,165	2.29
	After 10 years		3,805,675		28,772		68,790		3,765,657	2.47
Total mortgage-backed securities			4,142,875		33,011		70,554		4,105,332	2.46
Equity securities (without contractual maturity)			1,246		876		-		2,122	7.94
Other
	Within 1 year		8,539		11		-		8,550	1.78
	After 5 to 10 years		1,004		31		-		1,035	3.62
Total other			9,543		42		-		9,585	1.97
Total investment securities available-for-sale^[1]		$	8,279,363	$	43,379	$	112,936	$	8,209,806	1.94	%
[1]Includes $4.1 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 $3.4 billion serve as collateral for public funds.

Held To Maturity Securities Text Block

		At March 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	$	3,235	$	-	$	1,375	$	1,860	5.95	%
	After 1 to 5 years		15,200		-		6,627		8,573	6.03
	After 5 to 10 years		17,485		-		7,689		9,796	6.24
	After 10 years		58,333		1,387		8,360		51,360	1.80
Total obligations of Puerto Rico, States and political subdivisions			94,253		1,387		24,051		71,589	3.45
Collateralized mortgage obligations - federal agencies
	After 5 to 10 years		73		4		-		77	5.45
Total collateralized mortgage obligations - federal agencies			73		4		-		77	5.45
Other
	Within 1 year		1,250		-		25		1,225	1.62
	After 1 to 5 years		750		-		13		737	2.75
Total other			2,000		-		38		1,962	2.04
Total investment securities held-to-maturity^[1]		$	96,326	$	1,391	$	24,089	$	73,628	3.42	%
[1]Includes $94.3 million pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral.

		At December 31, 2016
				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	$	3,105	$	-	$	1,240	$	1,865	5.90	%
	After 1 to 5 years		14,540		-		5,957		8,583	6.02
	After 5 to 10 years		18,635		-		7,766		10,869	6.20
	After 10 years		59,747		1,368		8,892		52,223	1.91
Total obligations of Puerto Rico, States and political subdivisions			96,027		1,368		23,855		73,540	3.49
Collateralized mortgage obligations - federal agencies
	After 5 to 10 years		74		4		-		78	5.45
Total collateralized mortgage obligations - federal agencies			74		4		-		78	5.45
Other
	Within 1 year		1,000		-		3		997	1.65
	After 1 to 5 years		1,000		-		39		961	2.44
Total other			2,000		-		42		1,958	2.05
Total investment securities held-to-maturity^[1]		$	98,101	$	1,372	$	23,897	$	75,576	3.46	%
[1]Includes $53.1 million pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral.

Available For Sale Securities Member

Schedule Of Unrealized Loss On Investments Table Text Block

		At March 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		$	1,711,899	$	9,520	$	-	$	-	$	1,711,899	$	9,520
Obligations of U.S. Government sponsored entities			405,934		1,797		2,945		34		408,879		1,831
Obligations of Puerto Rico, States and political
	subdivisions		6,353		127		14,556		8,069		20,909		8,196
Collateralized mortgage obligations - federal agencies			471,245		8,778		325,069		15,361		796,314		24,139
Mortgage-backed securities			3,601,972		68,519		14,453		381		3,616,425		68,900
Total investment securities available-for-sale in an
	unrealized loss position	$	6,197,403	$	88,741	$	357,023	$	23,845	$	6,554,426	$	112,586

		At December 31, 2016
		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		$	1,162,110	$	9,579	$	-	$	-	$	1,162,110	$	9,579
Obligations of U.S. Government sponsored entities			430,273		2,426		3,126		79		433,399		2,505
Obligations of Puerto Rico, States and political
	subdivisions		6,258		161		16,512		6,092		22,770		6,253
Collateralized mortgage obligations - federal agencies			505,503		8,112		339,236		15,933		844,739		24,045
Mortgage-backed securities			3,537,606		70,173		15,113		381		3,552,719		70,554
Total investment securities available-for-sale in an
	unrealized loss position	$	5,641,750	$	90,451	$	373,987	$	22,485	$	6,015,737	$	112,936

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

		March 31, 2017				December 31, 2016

(In thousands)	Amortized cost		Fair value		Amortized cost		Fair value
FNMA	$	3,435,528	$	3,392,789	$	3,255,844	$	3,211,443
Freddie Mac		1,391,110		1,371,949		1,381,197		1,361,933

Held To Maturity Securities Member

Schedule Of Unrealized Loss On Investments Table Text Block

		At March 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		$	31,526	$	1,764	$	28,703	$	22,287	$	60,229	$	24,051
Other			737		13		1,225		25		1,962		38
Total investment securities held-to-maturity in an unrealized
	loss position	$	32,263	$	1,777	$	29,928	$	22,312	$	62,191	$	24,089

		At December 31, 2016
		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		$	31,294	$	1,702	$	30,947	$	22,153	$	62,241	$	23,855
Other			491		9		1,217		33		1,708		42
Total investment securities held-to-maturity in an unrealized
	loss position	$	31,785	$	1,711	$	32,164	$	22,186	$	63,949	$	23,897

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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- 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.

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