Investment securities (Tables)

12 Months Ended

Dec. 31, 2016

Available For Sale Securities Text Block

		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.

		At December 31, 2015
				Gross		Gross				Weighted
		Amortized		unrealized		unrealized		Fair		average
(In thousands)		cost		gains		losses		value		yield
U.S. Treasury securities
	Within 1 year	$	24,861	$	335	$	-	$	25,196	4.31	%
	After 1 to 5 years		1,149,807		365		1,999		1,148,173	1.03
	After 5 to 10 years		9,937		22		-		9,959	1.99
Total U.S. Treasury securities			1,184,605		722		1,999		1,183,328	1.11
Obligations of U.S. Government sponsored entities
	After 1 to 5 years		919,819		1,337		4,808		916,348	1.33
	After 5 to 10 years		250		1		-		251	5.64
	After 10 years		23,000		42		-		23,042	3.22
Total obligations of U.S. Government sponsored entities			943,069		1,380		4,808		939,641	1.38
Obligations of Puerto Rico, States and political subdivisions
	After 1 to 5 years		7,227		-		199		7,028	3.94
	After 5 to 10 years		5,925		-		2,200		3,725	4.02
	After 10 years		18,585		-		6,979		11,606	6.99
Total obligations of Puerto Rico, States and political subdivisions			31,737		-		9,378		22,359	5.74
Collateralized mortgage obligations - federal agencies
	After 1 to 5 years		21,446		594		37		22,003	2.81
	After 5 to 10 years		44,585		733		-		45,318	2.85
	After 10 years		1,518,662		8,137		33,283		1,493,516	1.99
Total collateralized mortgage obligations - federal agencies			1,584,693		9,464		33,320		1,560,837	2.02
Mortgage-backed securities
	After 1 to 5 years		22,015		987		8		22,994	4.65
	After 5 to 10 years		256,097		4,866		1,197		259,766	2.51
	After 10 years		2,039,217		34,839		12,620		2,061,436	2.83
Total mortgage-backed securities			2,317,329		40,692		13,825		2,344,196	2.81
Equity securities (without contractual maturity)			1,350		1,053		5		2,398	7.92
Other
	After 1 to 5 years		8,911		-		28		8,883	1.71
	After 5 to 10 years		1,311		39		-		1,350	3.62
Total other			10,222		39		28		10,233	1.95
Total investment securities available-for-sale^[1]		$	6,073,005	$	53,350	$	63,363	$	6,062,992	2.07	%
[1]Includes $2.4 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 $1.5 billion serve as collateral for public funds.

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

(In thousands)		Amortized cost		Fair value
Within 1 year	$	952,659	$	953,999
After 1 to 5 years		1,958,925		1,948,527
After 5 to 10 years		362,567		363,395
After 10 years		5,003,966		4,941,763
Total		8,278,117		8,207,684
Equity securities		1,246		2,122
Total investment securities available-for-sale	$	8,279,363	$	8,209,806

Schedule Of Realized Gains Losses [Table Text Block]

	Years ended December 31,
(In thousands)		2016		2015		2014
Gross realized gains	$	378	$	226	$	4,461
Gross realized losses		-		(85)		(5,331)
Net realized gains (losses) on sale of investment securities available-for-sale	$	378	$	141	$	(870)

Held To Maturity Securities Text Block

		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.

		At December 31, 2015
				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	$	2,920	$	-	$	291	$	2,629	5.90	%
	After 1 to 5 years		13,655		-		5,015		8,640	5.98
	After 5 to 10 years		20,020		-		8,020		12,000	6.14
	After 10 years		62,222		3,604		8,280		57,546	2.08
Total obligations of Puerto Rico, States and political subdivisions			98,817		3,604		21,606		80,815	3.55
Collateralized mortgage obligations - federal agencies
	After 5 to 10 years		86		5		-		91	5.45
Total collateralized mortgage obligations - federal agencies			86		5		-		91	5.45
Other
	After 1 to 5 years		2,000		-		17		1,983	1.81
Total other			2,000		-		17		1,983	1.81
Total investment securities held-to-maturity^[1]		$	100,903	$	3,609	$	21,623	$	82,889	3.52	%
[1]Includes $57.2 million pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral.

Schedule Of Aggregate Amortized Cost And Fair Value Of Htms By Contractual Maturity [Table Text Block]

(In thousands)		Amortized cost		Fair value
Within 1 year	$	4,105	$	2,862
After 1 to 5 years		15,540		9,544
After 5 to 10 years		18,709		10,947
After 10 years		59,747		52,223
Total investment securities held-to-maturity	$	98,101	$	75,576

Available For Sale Securities Member

Schedule Of Unrealized Loss On Investments Table Text Block

		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

		At December 31, 2015
		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		$	589,689	$	1,999	$	-	$	-	$	589,689	$	1,999
Obligations of U.S. Government sponsored entities			390,319		2,128		181,744		2,680		572,063		4,808
Obligations of Puerto Rico, States and political
	subdivisions		884		164		19,490		9,214		20,374		9,378
Collateralized mortgage obligations - federal agencies			331,501		4,446		814,195		28,874		1,145,696		33,320
Mortgage-backed securities			1,641,663		12,992		22,362		833		1,664,025		13,825
Equity securities			45		5		-		-		45		5
Other			8,883		28		-		-		8,883		28
Total investment securities available-for-sale in an
	unrealized loss position	$	2,962,984	$	21,762	$	1,037,791	$	41,601	$	4,000,775	$	63,363

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

		2016				2015

(In thousands)	Amortized cost		Fair value		Amortized cost		Fair value
FNMA	$	3,255,844	$	3,211,443	$	2,649,860	$	2,633,899
Freddie Mac		1,381,197		1,361,933		1,088,691		1,079,956

Held To Maturity Securities Member

Schedule Of Unrealized Loss On Investments Table Text Block

		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

		At December 31, 2015
		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		$	-	$	-	$	33,334	$	21,606	$	33,334	$	21,606
Other			1,483		17		-		-		1,483		17
Total investment securities held-to-maturity in an unrealized
	loss position	$	1,483	$	17	$	33,334	$	21,606	$	34,817	$	21,623

- 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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