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Note 10 - Collateralized Securities Transactions - Secured Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Securities sold under agreements to repurchase	$ 541,734	$ 408,203
Receivables under resale agreements	541,955	408,408
Overnight and Continuous [Member]
Securities sold under agreements to repurchase	125,503
Receivables under resale agreements	125,582
Maturity Less than 30 Days [Member]
Securities sold under agreements to repurchase	416,231	408,203
Receivables under resale agreements	416,373	408,408
Maturity 30 to 90 Days [Member]
Securities sold under agreements to repurchase	0	0
Receivables under resale agreements	0	0
Maturity Greater than 90 Days [Member]
Securities sold under agreements to repurchase	0	0
Receivables under resale agreements	0	0
Collateralized Mortgage-Backed Securities [Member]
Securities sold under agreements to repurchase	541,734	408,203
Receivables under resale agreements	541,955	408,408
Collateralized Mortgage-Backed Securities [Member] | Overnight and Continuous [Member]
Securities sold under agreements to repurchase	125,503
Receivables under resale agreements	125,582
Collateralized Mortgage-Backed Securities [Member] | Maturity Less than 30 Days [Member]
Securities sold under agreements to repurchase	416,231	408,203
Receivables under resale agreements	416,373	408,408
Collateralized Mortgage-Backed Securities [Member] | Maturity 30 to 90 Days [Member]
Securities sold under agreements to repurchase	0	0
Receivables under resale agreements	0	0
Collateralized Mortgage-Backed Securities [Member] | Maturity Greater than 90 Days [Member]
Securities sold under agreements to repurchase	0	0
Receivables under resale agreements	$ 0	$ 0

X

- Definition

Amount, after the effects of master netting arrangements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes purchases of participations in pools of securities that are subject to a resale agreement, assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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- Definition

Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13)(1))
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