Note 14 - Fair Value Measurements and Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2026

Notes Tables

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

		*June 30, 2026*
		*Fair Value Measurements Using*												*Total Fair Value*
		*Level 1*				*Level 2*				*Level 3*				*Measurements*
		($ In thousands)
Assets
Securities AFS
U.S. Treasury securities		$	936,464			$	—			$	—			$	936,464
U.S. government agency entities			—				1,045				—				1,045
Mortgage-backed securities			—				670,853				—				670,853
Collateralized mortgage obligations			—				4,624				—				4,624
Corporate debt securities			—				69,834				—				69,834
Total securities AFS			936,464				746,356				—				1,682,820

Equity securities
Mutual funds			8,601				—				—				8,601
Preferred stock of government sponsored entities			6,472				—				—				6,472
Other equity securities			11,409				—				—				11,409
Total equity securities			26,482				—				—				26,482

Interest rate swaps			—				20,814				—				20,814
Foreign exchange contracts			—				459				—				459
Total assets		$	962,946			$	767,629			$	—			$	1,730,575

Liabilities
Interest rate swaps		$	—			$	18,873			$	—			$	18,873
Foreign exchange contracts			—				190				—				190
Total liabilities		$	—			$	19,063			$	—			$	19,063

		*December 31, 2025*
		*Fair Value Measurements Using*												*Total Fair Value*
		*Level 1*				*Level 2*				*Level 3*				*Measurements*
		($ In thousands)
Assets
Securities AFS
U.S. Treasury securities		$	828,193			$	—			$	—			$	828,193
U.S. government agency entities			—				5,822				—				5,822
U.S. government sponsored entities			—				25,011				—				25,011
Mortgage-backed securities			—				629,437				—				629,437
Collateralized mortgage obligations			—				22,748				—				22,748
Corporate debt securities			—				147,012				—				147,012
Total securities AFS			828,193				830,030				—				1,658,223

Equity securities
Mutual funds			8,691				—				—				8,691
Preferred stock of government sponsored entities			9,364				—				—				9,364
Other equity securities			14,699				—				—				14,699
Total equity securities			32,754				—				—				32,754

Interest rate swaps			—				26,472				—				26,472
Foreign exchange contracts			—				211				—				211
Total assets		$	860,947			$	856,713			$	—			$	1,717,660

Liabilities
Interest rate swaps		$	—			$	28,917			$	—			$	28,917
Foreign exchange contracts			—				73				—				73
Total liabilities		$	—			$	28,990			$	—			$	28,990

Fair Value Measurements, Nonrecurring [Table Text Block]

		*As of June 30, 2026*																*Total Losses*
		*Fair Value Measurements Using*												*Total Fair Value*				*For the Three Months Ended*								*For the Six Months Ended*
		*Level 1*				*Level 2*				*Level 3*				*Measurements*				*June 30, 2026*				*June 30, 2025*				*June 30, 2026*				*June 30, 2025*
		($ In thousands)
Assets
Non-accrual loans by type:
Commercial loans		$	—			$	—			$	24			$	24			$	—			$	—			$	—			$	8,652
Commercial real estate loans			—				—				17,235				17,235				—				—				971				3,839
Residential mortgage loans and equity lines			—				—				205				205				—				—				—				—
Total non-accrual loans			—				—				17,464				17,464				—				—				971				12,491
Other real estate owned ⁽¹⁾			—				—				35,741				35,741				—				—				—				—
Other equity securities			—				—				1,539				1,539				—				—				—				—
Investments in venture capital			—				—				84				84				—				—				—				—
Total assets		$	—			$	—			$	54,828			$	54,828			$	—			$	—			$	971			$	12,491

⁽¹⁾ Other real estate owned balance of $33.4 million in the Consolidated Balance Sheets is net of estimated disposal costs.

		*As of December 31, 2025*																*Total Losses*
		*Fair Value Measurements Using*												*Total Fair Value*				*For the Twelve Months Ended*
		*Level 1*				*Level 2*				*Level 3*				*Measurements*				*December 31, 2025*				*December 31, 2024*
		($ In thousands)
Assets
Non-accrual loans by type:
Commercial loans		$	—			$	—			$	1,030			$	1,030			$	6,395			$	5,654
Commercial real estate loans			—				—				28,356				28,356				4,562				4,049
Residential mortgage loans and equity lines			—				—				217				217				—				59
Total non-accrual loans			—				—				29,603				29,603				10,957				9,762
Other real estate owned⁽¹⁾			—				—				32,356				32,356				—				—
Other equity securities			—				—				1,539				1,539				—				—
Investments in venture capital			—				—				84				84				2				147
Total assets		$	—			$	—			$	63,582			$	63,582			$	10,959			$	9,909

⁽¹⁾ Other real estate owned balance of $30.3 million in the Consolidated Balance Sheets is net of estimated disposal costs.

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

		*June 30, 2026*								*December 31, 2025*
		*Carrying*								*Carrying*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
		($ In thousands)
Financial Assets
Cash and due from banks		$	163,976			$	163,976			$	146,320			$	146,320
Short-term investments			1,163,120				1,163,120				1,278,089				1,278,089
Securities AFS			1,682,820				1,682,820				1,658,223				1,658,223
Loans held for investment, net			20,387,830				20,647,585				19,936,388				20,516,176
Equity securities			80,854				80,854				51,886				51,886
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		$	196,989			$	459			$	176,037			$	211
Interest rate swaps			1,331,033				20,814				1,113,823				26,472

		*Carrying*								*Carrying*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
Financial Liabilities
Deposits		$	21,061,648			$	21,029,316			$	20,894,167			$	20,884,386
Long-term debt			119,136				83,157				119,136				79,818

		*Notional*								*Notional*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
Foreign exchange contracts		$	15,818			$	190			$	37,991			$	73
Interest rate swaps			1,646,545				18,873				1,590,384				28,917

		*Notional*								*Notional*
		*Amount*				*Fair Value*				*Amount*				*Fair Value*
Off-Balance Sheet Financial Instruments
Commitments to extend credit		$	4,115,612			$	(23,080	)		$	3,809,999			$	(21,357	)
Standby letters of credit			451,689				(2,441	)			536,745				(2,971	)
Other letters of credit			16,527				(14	)			4,442				(5	)

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

		*As of June 30, 2026*
		*Fair Value*				*Level 1*				*Level 2*				*Level 3*
		($ In thousands)
Financial Assets
Cash and due from banks		$	163,976			$	163,976			$	—			$	—
Short-term investments			1,163,120				1,163,120				—				—
Loans held for investment, net			20,647,585				—				—				20,647,585
Equity securities			1,539				—				—				1,539
Investment in Federal Home Loan Bank stock			17,250				—				17,250				—
Financial Liabilities
Deposits			21,029,316				—				—				21,029,316
Long-term debt			83,157				—				83,157				—

		*As of December 31, 2025*
		*Fair Value*				*Level 1*				*Level 2*				*Level 3*
		($ In thousands)
Financial Assets
Cash and due from banks		$	146,320			$	146,320			$	—			$	—
Short-term investments			1,278,089				1,278,089				—				—
Loans held for investment, net			20,516,176				—				—				20,516,176
Equity securities			1,539				—				—				1,539
Investment in Federal Home Loan Bank stock			17,250				—				17,250				—
Financial Liabilities
Deposits			20,884,386				—				—				20,884,386
Long-term debt			79,818				—				79,818				—