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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=SL120269820-111563

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Debt Securities Held-to-maturity - Weighted average yield and contractual maturities of debt securities HTM (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Amortized cost
Amortized cost	$ 1,953,710		$ 79,461
Allowance for credit losses
Allowance for credit losses	7,210		8,096
Net of Allowance
Net of Allowance	1,946,500		71,365
Gross unrecognized gains
Gross Unrealized Gains	5,136		12,003
Gross unrealized losses
Gross Unrealized Losses	54,078		0
Fair Value
Fair value	$ 1,897,558		$ 83,368
Weighted Average Yield
Weighted Average Yield	2.80%		3.06%
US Treasury Securities
Amortized cost
Amortized cost - Within 1 year	$ 348,053
Amortized cost - After 1 to 5 years	1,533,494
Amortized cost	1,881,547
Allowance for credit losses
Allowance for credit losses - Within 1 Year	0
Allowance for credit losses - After 1 to 5 years	0
Allowance for credit losses	0
Net of Allowance
Net of Allowance - Within 1 Year	348,053
Net of Allowance - After 1 to 5 Years	1,533,494
Net of Allowance	1,881,547
Gross unrecognized gains
Gross unrealized gains - Within 1 year	0
Gross unrealized gains - After 1 to 5 years	0
Gross Unrealized Gains	0
Gross unrealized losses
Gross unrealized losses - Within 1 year	3,262
Gross unrealized losses - After 1 to 5 years	48,605
Gross Unrealized Losses	51,867
Fair Value
Fair Value - within 1 year	344,791
Fair Value - After 1 to 5 years	1,484,889
Fair value	$ 1,829,680
Weighted Average Yield
Weighted average yield - Within 1 Year	3.00%
Weighted average yield - After 1 to 5 years	2.75%
Weighted Average Yield	2.80%
Obligations of Puerto Rico, States and political subdivisions
Amortized cost
Amortized cost - Within 1 year	$ 4,530		$ 4,240
Amortized cost - After 1 to 5 years	19,105		14,395
Amortized cost - After 5 to 10 years	1,025		11,280
Amortized cost - After 10 years	41,519		43,561
Amortized cost	66,179		73,476
Allowance for credit losses
Allowance for credit losses - Within 1 Year	11		7
Allowance for credit losses - After 1 to 5 years	215		148
Allowance for credit losses - After 5 to 10 years	33		122
Allowance for credit losses - After 10 years	6,951		7,819
Allowance for credit losses	7,210	$ 7,495	8,096	$ 9,222	$ 10,214	$ 10,261
Net of Allowance
Net of Allowance - Within 1 Year	4,519		4,233
Net of Allowance - After 1 to 5 Years	18,890		14,247
Net of Allowance - After 5 to 10 Years	992		11,158
Net of Allowance - After 10 Years	34,568		35,742
Net of Allowance	58,969		65,380
Gross unrecognized gains
Gross unrealized gains - Within 1 year	7		4
Gross unrealized gains - After 1 to 5 years	149		149
Gross unrealized gains - After 5 to 10 years	33		104
Gross unrealized gains - After 10 years	4,947		11,746
Gross Unrealized Gains	5,136		12,003
Gross unrealized losses
Gross unrealized losses - Within 1 year	0		0
Gross unrealized losses - After 1 to 5 years	81		0
Gross unrealized losses - After 5 to 10 years	0		0
Gross unrealized losses - After 10 years	2,130		0
Gross Unrealized Losses	2,211		0
Fair Value
Fair Value - within 1 year	4,526		4,237
Fair Value - After 1 to 5 years	18,958		14,396
Fair Value - After 5 to 10 years	1,025		11,262
Fair Value - After 10 years	37,385		47,488
Fair value	$ 61,894		$ 77,383
Weighted Average Yield
Weighted average yield - Within 1 Year	6.10%		6.07%
Weighted average yield - After 1 to 5 years	4.24%		6.23%
Weighted average yield - After 5 to 10 years	5.80%		2.18%
Weighted average yield - After 10 years	1.41%		1.50%
Weighted Average Yield	2.62%		2.79%
Collateralized Mortgage Obligations - Federal agencies
Amortized cost
Amortized cost - After 1 to 5 years	$ 24		$ 25
Amortized cost	24		25
Allowance for credit losses
Allowance for credit losses - After 1 to 5 years	0		0
Allowance for credit losses	0		0
Net of Allowance
Net of Allowance - After 1 to 5 Years	24		25
Net of Allowance	24		25
Gross unrecognized gains
Gross unrealized gains - After 1 to 5 years	0		0
Gross Unrealized Gains	0		0
Gross unrealized losses
Gross unrealized losses - After 1 to 5 years	0		0
Gross Unrealized Losses	0		0
Fair Value
Fair Value - After 1 to 5 years	24		25
Fair value	$ 24		$ 25
Weighted Average Yield
Weighted average yield - After 1 to 5 years	6.44%		6.44%
Weighted Average Yield	6.44%		6.44%
Securities in wholly owned statutory business trusts
Amortized cost
Amortized cost - After 10 years	$ 5,960		$ 5,960
Amortized cost	5,960		5,960
Allowance for credit losses
Allowance for credit losses - After 10 years	0		0
Allowance for credit losses	0		0
Net of Allowance
Net of Allowance - After 10 Years	5,960		5,960
Net of Allowance	5,960		5,960
Gross unrecognized gains
Gross unrealized gains - After 10 years	0		0
Gross Unrealized Gains	0		0
Gross unrealized losses
Gross unrealized losses - After 10 years	0		0
Gross Unrealized Losses	0		0
Fair Value
Fair Value - After 10 years	5,960		5,960
Fair value	$ 5,960		$ 5,960
Weighted Average Yield
Weighted average yield - After 10 years	6.33%		6.33%
Weighted Average Yield	6.33%		6.33%