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ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2026

ACCOUNTING POLICIES

Schedule of Hedged Assets and Cumulative Fair Value Hedging Adjustments

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March 31, 2026

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December 31, 2025

(dollars in thousands)

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Amortized Cost Basis

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Hedged Asset

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Basis Adjustment

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Amortized Cost Basis

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Hedged Asset

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Basis Adjustment

Fixed rate assets

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$

668,155

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$

150,074

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$

74

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$

690,274

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$

150,178

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$

178

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- References

No definition available.

+ Details

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Namespace Prefix:	frst_
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- Definition

Tabular disclosure of derivative assets at fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

+ Details

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