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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	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Amortized cost
Amortized cost	$ 1,664,015		$ 79,461
Allowance for credit losses
Allowance for credit losses	7,495		8,096
Net of Allowance
Net of Allowance	1,656,520		71,365
Gross unrecognized gains
Gross Unrealized Gains	6,080		12,003
Gross unrealized losses
Gross Unrealized Losses	13,039		0
Fair Value
Fair value	$ 1,649,561		$ 83,368
Weighted Average Yield
Weighted Average Yield	2.68%		3.06%
US Treasury Securities
Amortized cost
Amortized cost - Within 1 year	$ 98,743
Amortized cost - After 1 to 5 years	1,490,003
Amortized cost	1,588,746
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	98,743
Net of Allowance - After 1 to 5 Years	1,490,003
Net of Allowance	1,588,746
Gross unrecognized gains
Gross unrealized gains - Within 1 year	116
Gross unrealized gains - After 1 to 5 years	0
Gross Unrealized Gains	116
Gross unrealized losses
Gross unrealized losses - Within 1 year	0
Gross unrealized losses - After 1 to 5 years	11,276
Gross Unrealized Losses	11,276
Fair Value
Fair Value - within 1 year	98,859
Fair Value - After 1 to 5 years	1,478,727
Fair value	$ 1,577,586
Weighted Average Yield
Weighted average yield - Within 1 Year	3.03%
Weighted average yield - After 1 to 5 years	2.64%
Weighted Average Yield	2.67%
Obligations of Puerto Rico, States and political subdivisions
Amortized cost
Amortized cost - Within 1 year	$ 4,440		$ 4,240
Amortized cost - After 1 to 5 years	13,045		14,395
Amortized cost - After 5 to 10 years	9,530		11,280
Amortized cost - After 10 years	42,270		43,561
Amortized cost	69,285		73,476
Allowance for credit losses
Allowance for credit losses - Within 1 Year	7		7
Allowance for credit losses - After 1 to 5 years	168		148
Allowance for credit losses - After 5 to 10 years	110		122
Allowance for credit losses - After 10 years	7,210		7,819
Allowance for credit losses	7,495	$ 7,844	8,096	$ 10,214	$ 10,096	$ 10,261
Net of Allowance
Net of Allowance - Within 1 Year	4,433		4,233
Net of Allowance - After 1 to 5 Years	12,877		14,247
Net of Allowance - After 5 to 10 Years	9,420		11,158
Net of Allowance - After 10 Years	35,060		35,742
Net of Allowance	61,790		65,380
Gross unrecognized gains
Gross unrealized gains - Within 1 year	7		4
Gross unrealized gains - After 1 to 5 years	168		149
Gross unrealized gains - After 5 to 10 years	27		104
Gross unrealized gains - After 10 years	5,762		11,746
Gross Unrealized Gains	5,964		12,003
Gross unrealized losses
Gross unrealized losses - Within 1 year	1		0
Gross unrealized losses - After 1 to 5 years	0		0
Gross unrealized losses - After 5 to 10 years	112		0
Gross unrealized losses - After 10 years	1,650		0
Gross Unrealized Losses	1,763		0
Fair Value
Fair Value - within 1 year	4,439		4,237
Fair Value - After 1 to 5 years	13,045		14,396
Fair Value - After 5 to 10 years	9,335		11,262
Fair Value - After 10 years	39,172		47,488
Fair value	$ 65,991		$ 77,383
Weighted Average Yield
Weighted average yield - Within 1 Year	6.10%		6.07%
Weighted average yield - After 1 to 5 years	6.28%		6.23%
Weighted average yield - After 5 to 10 years	1.40%		2.18%
Weighted average yield - After 10 years	1.46%		1.50%
Weighted Average Yield	2.66%		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%