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Note 12 - Fair Value Measurements and Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		*September 30, 2025*
		*Fair Value Measurements Using*												*Total Fair Value*
		*Level 1*				*Level 2*				*Level 3*				*Measurements*
		($ In thousands)
Assets
Securities AFS
U.S. Treasury securities		$	776,833			$	—			$	—			$	776,833
U.S. government agency entities			—				6,860				—				6,860
U.S. government sponsored entities			—				25,005				—				25,005
Mortgage-backed securities			—				645,575				—				645,575
Collateralized mortgage obligations			—				23,302				—				23,302
Corporate debt securities			—				165,875				—				165,875
Total securities AFS			776,833				866,617				—				1,643,450

Equity securities
Mutual funds			5,686				—				—				5,686
Preferred stock of government sponsored entities			10,278				—				—				10,278
Other equity securities			14,608				—				—				14,608
Total equity securities			30,572				—				—				30,572

Interest rate swaps			—				29,162				—				29,162
Foreign exchange contracts			—				321				—				321
Total assets		$	807,405			$	896,100			$	—			$	1,703,505

Liabilities
Interest rate swaps		$	—			$	31,815			$	—			$	31,815
Foreign exchange contracts			—				185				—				185
Total liabilities		$	—			$	32,000			$	—			$	32,000

		*December 31, 2024*
		*Fair Value Measurements Using*												*Total Fair Value*
		*Level 1*				*Level 2*				*Level 3*				*Measurements*
		($ In thousands)
Assets
Securities AFS
U.S. Treasury securities		$	621,462			$	—			$	—			$	621,462
U.S. government agency entities			—				9,149				—				9,149
Mortgage-backed securities			—				684,016				—				684,016
Collateralized mortgage obligations			—				24,556				—				24,556
Corporate debt securities			—				207,945				—				207,945
Total securities AFS			621,462				925,666				—				1,547,128

Equity securities
Mutual funds			5,532				—				—				5,532
Preferred stock of government sponsored entities			7,287				—				—				7,287
Other equity securities			20,071				—				—				20,071
Total equity securities			32,890				—				—				32,890

Interest rate swaps			—				39,958				—				39,958
Foreign exchange contracts			—				490				—				490
Total assets		$	654,352			$	966,114			$	—			$	1,620,466

Liabilities
Interest rate swaps		$	—			$	36,319			$	—			$	36,319
Foreign exchange contracts			—				785				—				785
Total liabilities		$	—			$	37,104			$	—			$	37,104

Fair Value Measurements, Nonrecurring [Table Text Block]

		*As of September 30, 2025*																*Total Losses*
		*Fair Value Measurements Using*												*Total Fair Value*				*For the Three Months Ended*								*For the Nine Months Ended*
		*Level 1*				*Level 2*				*Level 3*				*Measurements*				*September 30, 2025*				*September 30, 2024*				*September 30, 2025*				*September 30, 2024*
		($ In thousands)
Assets
Non-accrual loans by type:
Commercial loans		$	—			$	—			$	5,741			$	5,741			$	9,028			$	1,923			$	9,115			$	2,961
Commercial real estate loans			—				—				32,095				32,095				314				1,746				4,153				1,997
Residential mortgage loans and equity lines			—				—				222				222				—				59				—				59
Total non-accrual loans			—				—				38,058				38,058				9,342				3,728				13,268				5,017
Other real estate owned ⁽¹⁾			—				—				34,746				34,746				—				—				—				—
Other equity securities			—				—				1,539				1,539				—				—				—				—
Investments in venture capital			—				—				84				84				—				—				—				—
Total assets		$	—			$	—			$	74,427			$	74,427			$	9,342			$	3,728			$	13,268			$	5,017

⁽¹⁾Other real estate owned balance of $33.0 million in the Consolidated Balance Sheets is net of estimated disposal costs.

		*As of December 31, 2024*																*Total Losses*
		*Fair Value Measurements Using*												*Total Fair Value*				*For the Twelve Months Ended*
		*Level 1*				*Level 2*				*Level 3*				*Measurements*				*December 31, 2024*				*December 31, 2023*
		($ In thousands)
Assets
Non-accrual loans by type:
Commercial loans		$	—			$	—			$	10,896			$	10,896			$	5,654			$	—
Commercial real estate loans			—				—				15,320				15,320				4,049				4,069
Residential mortgage loans and equity lines			—				—				243				243				59				—
Total non-accrual loans			—				—				26,459				26,459				9,762				4,069
Other real estate owned ⁽¹⁾			—				—				24,126				24,126				—				—
Other equity securities			—				—				1,539				1,539				—				—
Investments in venture capital			—				—				86				86				147				227
Total assets		$	—			$	—			$	52,210			$	52,210			$	9,909			$	4,296

⁽¹⁾ Other real estate owned balance of $23.1 million in the Consolidated Balance Sheets is net of estimated disposal costs.

Fair Value, by Balance Sheet Grouping [Table Text Block]

		*September 30, 2025*								*December 31, 2024*
		*Carrying*								*Carrying*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
		($ In thousands)
Financial Assets
Cash and due from banks		$	166,167			$	166,167			$	157,167			$	157,167
Short-term investments			1,141,886				1,141,886				882,353				882,353
Securities AFS			1,643,450				1,643,450				1,547,128				1,547,128
Loans held for investment, net			19,903,082				20,447,466				19,203,649				19,500,647
Equity securities			32,111				32,111				34,429				34,429
Investment in Federal Home Loan Bank stock			17,250				17,250				17,250				17,250

		*Notional*								*Notional*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
Foreign exchange contracts		$	114,395			$	321			$	62,794			$	490
Interest rate swaps			1,064,539				29,162				1,065,580				39,958

		*Carrying*								*Carrying*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
Financial Liabilities
Deposits		$	20,521,149			$	20,506,029			$	19,686,199			$	19,670,327
Advances from Federal Home Loan Bank			190,000				189,312				60,000				59,606
Other borrowings			17,628				15,338				17,740				15,281
Long-term debt			119,136				78,627				119,136				73,752

		*Notional*								*Notional*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
Foreign exchange contracts		$	122,381			$	185			$	171,945			$	785
Interest rate swaps			1,542,988				31,815				1,198,471				36,319

		*Notional*								*Notional*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
Off-Balance Sheet Financial Instruments
Commitments to extend credit		$	3,670,598			$	(18,620	)		$	3,470,296			$	(18,226	)
Standby letters of credit			510,886				(3,225	)			439,769				(2,900	)
Other letters of credit			6,452				(7	)			12,347				(14	)

Schedule Of Fair Value Of Financial Instruments [Table Text Block]

		*As of September 30, 2025*
		*Fair Value*				*Level 1*				*Level 2*				*Level 3*
		($ In thousands)
Financial Assets
Cash and due from banks		$	166,167			$	166,167			$	—			$	—
Short-term investments			1,141,886				1,141,886				—				—
Loans held for investment, net			20,447,466				—				—				20,447,466
Equity securities			1,539				—				—				1,539
Investment in Federal Home Loan Bank stock			17,250				—				17,250				—
Financial Liabilities
Deposits			20,506,029				—				—				20,506,029
Advances from Federal Home Loan Bank			189,312				—				189,312				—
Other borrowings			15,338				—				—				15,338
Long-term debt			78,627				—				78,627				—

		*As of December 31, 2024*
		*Fair Value*				*Level 1*				*Level 2*				*Level 3*
		($ In thousands)
Financial Assets
Cash and due from banks		$	157,167			$	157,167			$	—			$	—
Short-term investments			882,353				882,353				—				—
Loans held for investment, net			19,500,647				—				—				19,500,647
Equity securities			1,539				—				—				1,539
Investment in Federal Home Loan Bank stock			17,250				—				17,250				—
Financial Liabilities
Deposits			19,670,327				—				—				19,670,327
Advances from Federal Home Loan Bank			59,606				—				59,606				—
Other borrowings			15,281				—				—				15,281
Long-term debt			73,752				—				73,752				—