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Fair Value Information (Tables)

9 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The tables below present the balances of assets and liabilities measured at fair value on a recurring basis as of the dates presented.

		Carrying Value at September 30, 2025				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
		(Dollars in thousands)
Description of assets
Investment securities - AFS:
Government agency/GSE		$	34,752			$	—			$	34,752			$	—
Mortgage-backed securities			1,963,507				—				1,963,507				—
CMO/REMIC			558,279				—				558,279				—
Municipal bonds			21,203				—				21,203				—
Other securities			1,656				—				1,656				—
Total investment securities - AFS			2,579,397				—				2,579,397				—
Derivatives not designated as hedging   instruments:
Interest rate swaps			220				—				220				—
Total assets		$	2,579,617			$	—			$	2,579,617			$	—
Description of liability
Derivatives not designated as hedging   instruments:
Interest rate swaps		$	220			$	—			$	220			$	—
Derivatives designated as hedging instruments:
Fair value hedges: interest rate swaps			10,838				—				10,838				—
Cash flow hedges: interest rate swaps			2,763				—				2,763				—
Total liabilities		$	13,821			$	—			$	13,821			$	—

		Carrying Value at December 31, 2024				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
		(Dollars in thousands)
Description of assets
Investment securities - AFS:
Government agency/GSE		$	34,255			$	—			$	34,255			$	—
Mortgage-backed securities			2,134,534				—				2,134,534				—
CMO/REMIC			351,522				—				351,522				—
Municipal bonds			20,377				—				20,377				—
Other securities			1,427				—				1,427				—
Total investment securities - AFS			2,542,115				—				2,542,115				—
Derivatives not designated as hedging   instruments:
Interest rate swaps			30				—				30				—
Derivatives designated as hedging instruments:
Fair value hedges: interest rate swaps			7,222				—				7,222				—
Total assets		$	2,549,367			$	—			$	2,549,367			$	—
Description of liability
Derivatives not designated as hedging   instruments:
Interest rate swaps		$	30			$	—			$	30			$	—
Derivatives designated as hedging instruments:
Cash flow hedges: interest rate swaps			517				—				517				—
Total liabilities		$	547			$	—			$	547			$	—

Assets and Liabilities Measured at Fair Value on Non-Recurring Basis

the following tables provide the level of valuation assumptions used to determine each adjustment and the carrying value of the related assets that had losses during the period.

		Carrying value at September 30, 2025				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)				Total Losses For The Nine Months Ended September 30, 2025
		(Dollars in thousands)
Description of assets
Loans:
Commercial real estate		$	32,136			$	—			$	—			$	32,136			$	14
SBA			859				—				—				859				51
Commercial and industrial			2,077				—				—				2,077				17
Dairy & livestock and    agribusiness			395				—				—				395				10
Other real estate owned			661				—				—				661				—
Total assets		$	36,128			$	—			$	—			$	36,128			$	92

		Carrying value at December 31, 2024				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)				Total Losses For The Year Ended December 31, 2024
		(Dollars in thousands)
Description of assets
Loans:
Commercial real estate		$	28,728			$	—			$	—			$	28,728			$	11
SBA			1,532				—				—				1,532				49
Commercial and industrial			3,144				—				—				3,144				220
Dairy & livestock and    agribusiness			860				—				—				860				9
Other real estate owned			10,429				—				—				10,429				2,296
Total assets		$	44,693			$	—			$	—			$	44,693			$	2,585

Estimated Fair Value of Financial Instruments

The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

	September 30, 2025
	Carrying				Estimated Fair Value
	Amount				Level 1				Level 2				Level 3				Total
	(Dollars in thousands)
Assets
Total cash and cash equivalents	$	783,920			$	783,920			$	—			$	—			$	783,920
Interest-earning balances due from    depository institutions		13,163				—				13,163				—				13,163
Investment securities available-for-sale		2,579,397				—				2,579,397				—				2,579,397
Investment securities held-to-maturity		2,297,909				—				1,935,898				—				1,935,898
Total loans, net of allowance for credit losses		8,391,570				—				—				8,245,368				8,245,368
Derivatives not designated as hedging instruments:
Interest rate swaps		220				—				220				—				220
Liabilities
Deposits:
Interest-bearing	$	4,879,271			$	—			$	4,876,458			$	—			$	4,876,458
Borrowings		951,258				—				914,007				—				914,007
Derivatives not designated as hedging instruments:
Interest rate swaps		220				—				220				—				220
Derivatives designated as hedging instruments:
Fair value hedges: interest rate swaps		10,838				—				10,838				—				10,838
Cash flow hedges: interest rate swaps		2,763				—				2,763				—				2,763

	December 31, 2024
	Carrying				Estimated Fair Value
	Amount				Level 1				Level 2				Level 3				Total
	(Dollars in thousands)
Assets
Total cash and cash equivalents	$	204,698			$	204,698			$	—			$	—			$	204,698
Interest-earning balances due from    depository institutions		480				—				480				—				480
Investment securities available-for-sale		2,542,115				—				2,542,115				—				2,542,115
Investment securities held-to-maturity		2,379,668				—				1,954,345				—				1,954,345
Total loans, net of allowance for credit losses		8,456,310				—				—				8,149,801				8,149,801
Derivatives not designated as hedging instruments:
Interest rate swaps		30				—				30				—				30
Derivatives designated as hedging instruments:
Fair value hedges: interest rate swaps		7,222				—				7,222				—				7,222
Liabilities
Deposits:
Interest-bearing	$	4,911,285			$	—			$	4,908,070			$	—			$	4,908,070
Borrowings		761,887				—				716,566				—				716,566
Derivatives not designated as hedging instruments:
Interest rate swaps		30				—				30				—				30
Derivatives designated as hedging instruments:
Cash flow hedges: interest rate swaps		517				—				517				—				517

X

- Definition

Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-SubTopic 10
-Topic 825
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-10

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-13

Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-12

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
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Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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