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Debt securities available-for-sale (Tables)
12 Months Ended
Dec. 31, 2018
Investments Abstract  
Debt Securities, Available-For-Sale
At December 31, 2018
GrossGrossWeighted
AmortizedunrealizedunrealizedFair average
(In thousands)costgains lossesvalueyield
U.S. Treasury securities
Within 1 year$3,565,571$108$5,319$3,560,3602.10%
After 1 to 5 years4,483,74113,64735,2134,462,1752.25
After 5 to 10 years245,8913,770-249,6612.84
Total U.S. Treasury securities8,295,20317,52540,5328,272,1962.21
Obligations of U.S. Government sponsored entities
Within 1 year212,951-1,406211,5451.44
After 1 to 5 years123,85712,094121,7641.51
Total obligations of U.S. Government sponsored entities 336,80813,500333,3091.47
Obligations of Puerto Rico, States and political subdivisions
After 1 to 5 years6,926-1846,7420.70
Total obligations of Puerto Rico, States and political subdivisions6,926-1846,7420.70
Collateralized mortgage obligations - federal agencies
After 1 to 5 years749-77421.92
After 5 to 10 years115,74414,715111,0301.71
After 10 years638,9951,58423,680616,8992.10
Total collateralized mortgage obligations - federal agencies755,4881,58528,402728,6712.04
Mortgage-backed securities
Within 1 year4314-4354.30
After 1 to 5 years6,7624316,8042.74
After 5 to 10 years365,7271,0908,499358,3182.19
After 10 years3,710,73110,679128,1893,593,2212.45
Total mortgage-backed securities 4,083,65111,816136,6893,958,7782.43
Other
After 5 to 10 years4862-4883.62
Total other 4862-4883.62
Total debt securities available-for-sale[1]$13,478,562$30,929$209,307$13,300,1842.25%
[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.

At December 31, 2017
Gross Gross Weighted
Amortized unrealizedunrealizedFair average
(In thousands)costgains lossesvalueyield
U.S. Treasury securities
Within 1 year$1,112,791$8$2,101$1,110,6981.06%
After 1 to 5 years2,550,116-26,3192,523,7971.55
After 5 to 10 years293,579281191293,6692.24
Total U.S. Treasury securities3,956,48628928,6113,928,1641.46
Obligations of U.S. Government sponsored entities
Within 1 year276,30421818275,5071.26
After 1 to 5 years336,922223,518333,4261.48
Total obligations of U.S. Government sponsored entities 613,226434,336608,9331.38
Obligations of Puerto Rico, States and political subdivisions
After 1 to 5 years6,668-596,6092.30
Total obligations of Puerto Rico, States and political subdivisions6,668-596,6092.30
Collateralized mortgage obligations - federal agencies
Within 1 year40--402.60
After 1 to 5 years16,9721737517,0702.90
After 5 to 10 years36,1865752635,7172.31
After 10 years914,5682,78926,431890,9262.01
Total collateralized mortgage obligations - federal agencies967,7663,01927,032943,7532.03
Mortgage-backed securities
Within 1 year4848-4924.23
After 1 to 5 years14,59920621114,5943.50
After 5 to 10 years339,1612,3903,765337,7862.21
After 10 years4,385,36819,49369,0714,335,7902.46
Total mortgage-backed securities 4,739,61222,09773,0474,688,6622.44
Other
After 5 to 10 years78913-8023.62
Total other 78913-8023.62
Total debt securities available-for-sale[1]$10,284,547$25,461$133,085$10,176,9231.96%
[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.
Schedule Of Aggregate Amortized Cost And Fair Value Of Afs By Contractual Maturity
(In thousands)Amortized cost Fair value
Within 1 year$3,778,953$3,772,340
After 1 to 5 years4,622,0354,598,227
After 5 to 10 years727,848719,497
After 10 years4,349,7264,210,120
Total debt securities available-for-sale$13,478,562$13,300,184
Schedule Of Realized Gain Loss
Years ended December 31,
(In thousands)201820172016
Gross realized gains$-$95$38
Gross realized losses-(12)-
Net realized gains on sale of debt securities available-for-sale$-$83$38
Debt Securities Available For Sale Unrealized Loss Position Fair Value
At December 31, 2018
Less than 12 months12 months or moreTotal
GrossGrossGross
Fair unrealizedFair unrealizedFair unrealized
(In thousands)value lossesvalue lossesvalue 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 entities14,84746318,2713,454333,1183,500
Obligations of Puerto Rico, States and political
subdivisions--6,7421846,742184
Collateralized mortgage obligations - federal agencies 66,652489587,86927,913654,52128,402
Mortgage-backed securities125,8722,2803,478,635134,4103,604,507136,690
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

At December 31, 2017
Less than 12 months12 months or moreTotal
GrossGrossGross
Fair unrealizedFair unrealizedFair unrealized
(In thousands)value lossesvalue lossesvalue 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 entities214,6701,108376,8073,228591,4774,336
Obligations of Puerto Rico, States and political
subdivisions6,60959--6,60959
Collateralized mortgage obligations - federal agencies 153,3362,110595,33924,922748,67527,032
Mortgage-backed securities1,515,29512,5292,652,35960,5184,167,65473,047
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
Schedule Of Securities Aggregate Amortized Cost Exceed 10 Of Stockholders Equity
20182017
(In thousands)Amortized costFair valueAmortized costFair value
FNMA$2,999,110$2,901,904$3,621,537$3,572,474
Freddie Mac1,095,8551,058,0131,358,7081,335,685