Note 13 - Fair Value Measurements and Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

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

	September 30, 2022
	Fair Value Measurements Using						Total Fair Value
	Level 1		Level 2		Level 3		Measurements
	(In thousands)
Assets
Securities available-for-sale
U.S. Treasury securities	$	241,400	$	—	$	—	$	241,400
U.S. government agency entities		—		69,112		—		69,112
Mortgage-backed securities		—		861,488		—		861,488
Collateralized mortgage obligations		—		31,709		—		31,709
Corporate debt securities		—		210,702		—		210,702
Total securities available-for-sale		241,400		1,173,011		—		1,414,411
Equity securities
Mutual funds		5,497		—		—		5,497
Preferred stock of government sponsored entities		2,110		—		—		2,110
Other equity securities		15,516		—		—		15,516
Total equity securities		23,123		—		—		23,123
Warrants		—		—		46		46
Interest rate swaps		—		98,498		—		98,498
Foreign exchange contracts		—		752		—		752
Total assets	$	264,523	$	1,272,261	$	46	$	1,536,830
Liabilities
Interest rate swaps	$	—	$	54,443	$	—	$	54,443
Foreign exchange contracts		—		2,054		—		2,054
Total liabilities	$	—	$	56,497	$	—	$	56,497

	December 31, 2021
	Fair Value Measurements Using						Total Fair Value
	Level 1		Level 2		Level 3		Measurements
	(In thousands)
Assets
Securities available-for-sale
U.S. government agency entities	$	—	$	87,509	$	—	$	87,509
Mortgage-backed securities		—		888,665		—		888,665
Collateralized mortgage obligations		—		9,117		—		9,117
Corporate debt securities		—		142,018		—		142,018
Total securities available-for-sale		—		1,127,309		—		1,127,309
Equity securities
Mutual funds		6,230		—		—		6,230
Preferred stock of government sponsored entities		1,811		—		—		1,811
Other equity securities		14,278		—		—		14,278
Total equity securities		22,319		—		—		22,319
Warrants		—		—		23		23
Interest rate swaps		—		10,090		—		10,090
Foreign exchange contracts		—		1,113		—		1,113
Total assets	$	22,319	$	1,138,512	$	23	$	1,160,854
Liabilities
Interest rate swaps	$	—	$	12,642	$	—	$	12,642
Foreign exchange contracts		—		327		—		327
Total liabilities	$	—	$	12,969	$	—	$	12,969

Fair Value Measurements, Nonrecurring [Table Text Block]

	As of September 30, 2022								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, 2022		September 30, 2021			September 30, 2022		September 30, 2021
	(In thousands)
Assets
Non accrual loans by type:
Commercial loans	$	—	$	—	$	6,887	$	6,887	$	1,786	$	—		$	1,786	$	2,037
Commercial mortgage loans		—		—		10,956		10,956		—		—			—		—
Residential mortgage loans and equity lines		—		—		5,407		5,407		—		—			—		—
Other installment loans		—		—		9		9		—		—			—		—
Total non accrual loans		—		—		23,259		23,259		1,786		—			1,786		2,037
Other real estate owned (1)		—		—		4,269		4,269		—		(55	)		—		(8	)
Investments in venture capital		—		—		836		836		—		8			—		143
Total assets	$	—	$	—	$	28,364	$	28,364	$	1,786	$	(47	)	$	1,786	$	2,172

	As of December 31, 2021								Total Losses
	Fair Value Measurements Using						Total Fair Value		For the Twelve Months Ended
	Level 1		Level 2		Level 3		Measurements		December 31, 2021		December 31, 2020
	(In thousands)
Assets
Non accrual loans by type:
Commercial loans	$	—	$	—	$	4,327	$	4,327	$	1,012	$	7,012
Commercial mortgage loans		—		—		13,335		13,335		—		—
Residential mortgage loans and equity lines		—		—		5,243		5,243		—		—
Total non accrual loans		—		—		22,905		22,905		1,012		7,012
Other real estate owned (1)		—		—		4,589		4,589		17		717
Investments in venture capital		—		—		952		952		143		107
Total assets	$	—	$	—	$	28,446	$	28,446	$	1,172	$	7,836

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

	September 30, 2022				December 31, 2021
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	200,051	$	200,051	$	134,141	$	134,141
Short-term investments		1,063,294		1,063,294		2,315,563		2,315,563
Securities available-for-sale		1,414,411		1,414,411		1,127,309		1,127,309
Loans, net		17,951,050		17,676,365		16,202,001		16,499,869
Equity securities		23,123		23,123		22,319		22,319
Investment in Federal Home Loan Bank stock		17,250		17,250		17,250		17,250
Warrants		46		46		23		23

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	162,518	$	752	$	181,997	$	1,113
Interest rate swaps		1,464,567		98,498		904,635		10,090

	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Financial Liabilities
Deposits	$	18,575,751	$	18,573,442	$	18,058,842	$	18,051,720
Advances from Federal Home Loan Bank		360,000		359,416		20,000		21,279
Other borrowings		22,651		18,357		23,145		18,945
Long-term debt		119,136		56,317		119,136		62,274

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	—	$	—	$	676	$	3
Foreign exchange contracts		45,990		2,054		51,782		327
Interest rate swaps		691,872		54,443		872,400		12,642

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	3,537,547	$	(14,650	)	$	3,297,362	$	(12,594	)
Standby letters of credit		290,618		(2,048	)		266,490		(2,640	)
Other letters of credit		13,070		(12	)		16,652		(13	)

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

	As of September 30, 2022
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	200,051	$	200,051	$	—	$	—
Short-term investments		1,063,294		1,063,294		—		—
Securities available-for-sale		1,414,411		241,400		1,173,011		—
Loans, net		17,676,365		—		—		17,676,365
Equity securities		23,123		23,123		—		—
Investment in Federal Home Loan Bank stock		17,250		—		17,250		—
Warrants		46		—		—		46
Financial Liabilities
Deposits		18,573,442		—		—		18,573,442
Advances from Federal Home Loan Bank		359,416		—		359,416		—
Other borrowings		18,357		—		—		18,357
Long-term debt		56,317		—		56,317		—

	As of December 31, 2021
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	134,141	$	134,141	$	—	$	—
Short-term investments		2,315,563		2,315,563		—		—
Securities available-for-sale		1,127,309		—		1,127,309		—
Loans, net		16,499,869		—		—		16,499,869
Equity securities		22,319		22,319		—		—
Investment in Federal Home Loan Bank stock		17,250		—		17,250		—
Warrants		23		—		—		23
Financial Liabilities
Deposits		18,051,720		—		—		18,051,720
Advances from Federal Home Loan Bank		21,279		—		21,279		—
Other borrowings		18,945		—		—		18,945
Long-term debt		62,274		—		62,274		—