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

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	June 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	$	118,998	$	—	$	—	$	118,998
U.S. government agency entities		—		76,941		—		76,941
Mortgage-backed securities		—		844,463		—		844,463
Collateralized mortgage obligations		—		22,580		—		22,580
Corporate debt securities		—		171,589		—		171,589
Total securities available-for-sale		118,998		1,115,573		—		1,234,571
Equity securities
Mutual funds		2,081		—		—		2,081
Preferred stock of government sponsored entities		5,739		—		—		5,739
Other equity securities		18,965		—		—		18,965
Total equity securities		26,785		—		—		26,785
Warrants		—		—		30		30
Interest rate swaps		—		58,335		—		58,335
Foreign exchange contracts		—		344		—		344
Total assets	$	145,783	$	1,174,252	$	30	$	1,320,065
Liabilities
Interest rate swaps	$	—	$	33,706	$	—	$	33,706
Foreign exchange contracts		—		914		—		914
Total liabilities	$	—	$	34,620	$	—	$	34,620

	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 June 30, 2022								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, 2022		June 30, 2021		June 30, 2022		June 30, 2021
	(In thousands)
Assets
Non accrual loans by type:
Commercial loans	$	—	$	—	$	12,103	$	12,103	$	—	$	—	$	—	$	—
Commercial mortgage loans		—		—		2,281		2,281		—		—		—		—
Residential mortgage loans and equity lines		—		—		8,055		8,055		—		—		—		—
Total non accrual loans		—		—		22,439		22,439		—		—		—		—
Other real estate owned (1)		—		—		4,269		4,269		—		47		—		47
Investments in venture capital		—		—		837		837		—		64		—		135
Total assets	$	—	$	—	$	27,545	$	27,545	$	—	$	111	$	—	$	182

	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]

	June 30, 2022				December 31, 2021
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	141,734	$	141,734	$	134,141	$	134,141
Short-term investments		1,012,228		1,012,228		2,315,563		2,315,563
Securities available-for-sale		1,234,571		1,234,571		1,127,309		1,127,309
Loans, net		17,633,576		17,440,309		16,202,001		16,499,869
Equity securities		26,785		26,785		22,319		22,319
Investment in Federal Home Loan Bank stock		17,250		17,250		17,250		17,250
Warrants		30		30		23		23

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	134,895	$	344	$	181,997	$	1,113
Interest rate swaps		1,454,544		58,335		904,635		10,090

	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Financial Liabilities
Deposits	$	18,287,327	$	18,266,740	$	18,058,842	$	18,051,720
Advances from Federal Home Loan Bank		95,000		94,969		20,000		21,279
Other borrowings		22,319		15,667		23,145		18,945
Long-term debt		119,136		55,126		119,136		62,274

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	202	$	2	$	676	$	3
Foreign exchange contracts		105,824		914		51,782		327
Interest rate swaps		727,649		33,706		872,400		12,642

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	3,395,976	$	(13,504	)	$	3,297,362	$	(12,594	)
Standby letters of credit		303,882		(2,664	)		266,490		(2,640	)
Other letters of credit		28,789		(21	)		16,652		(13	)

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

	As of June 30, 2022
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	141,734	$	141,734	$	—	$	—
Short-term investments		1,012,228		1,012,228		—		—
Securities available-for-sale		1,234,571		118,998		1,115,573		—
Loans, net		17,440,309		—		—		17,440,309
Equity securities		26,785		26,785		—		—
Investment in Federal Home Loan Bank stock		17,250		—		17,250		—
Warrants		30		—		—		30
Financial Liabilities
Deposits		18,266,740		—		—		18,266,740
Advances from Federal Home Loan Bank		94,969		—		94,969		—
Other borrowings		15,667		—		—		15,667
Long-term debt		55,126		—		55,126		—

	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		—