Note 14 - Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

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

	March 31, 2020				December 31, 2019
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	136,350	$	136,350	$	177,240	$	177,240
Short-term investments		363,666		363,666		416,538		416,538
Securities available-for-sale		1,355,173		1,355,173		1,451,842		1,451,842
Loans, net		15,385,662		15,588,186		14,951,631		15,444,752
Equity securities		18,790		18,790		28,005		28,005
Investment in Federal Home Loan Bank stock		17,250		17,250		18,090		18,090
Warrants		24		24		39		39

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	110,465	$	1,157	$	146,397	$	2,411
Interest rate swaps		32,346		3,210		130,401		2,181

	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Financial Liabilities
Deposits	$	15,090,150	$	15,133,137	$	14,692,308	$	14,719,452
Short-term borrowings		12,898		12,898		25,683		25,683
Advances from Federal Home Loan Bank		495,000		502,934		670,000		674,530
Other borrowings		36,697		31,323		36,666		30,764
Long-term debt		119,136		56,317		119,136		76,058

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	2,496	$	14	$	908	$	7
Foreign exchange contracts		216,401		4,211		127,003		1,415
Interest rate swaps		713,337		32,304		602,291		14,229

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	2,934,789	$	(9,176	)	$	3,077,081	$	(9,826	)
Standby letters of credit		261,096		(2,180	)		282,352		(2,431	)
Other letters of credit		19,878		(17	)		22,209		(20	)
Bill of lading guarantees		89		—			319		(1	)

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

	As of March 31, 2020
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	136,350	$	136,350	$	—	$	—
Short-term investments		363,666		363,666		—		—
Securities available-for-sale		1,355,173		—		1,355,173		—
Loans, net		15,588,186		—		—		15,588,186
Equity securities		18,790		18,790		—		—
Investment in Federal Home Loan Bank stock		17,250		—		17,250		—
Warrants		24		—		—		24
Financial Liabilities
Deposits		15,133,137		—		—		15,133,137
Short-term borrowings		12,898		—		—		12,898
Advances from Federal Home Loan Bank		502,934		—		502,934		—
Other borrowings		31,323		—		—		31,323
Long-term debt		56,317		—		56,317		—

	As of December 31, 2019
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	177,240	$	177,240	$	—	$	—
Short-term investments		416,538		416,538		—		—
Securities available-for-sale		1,451,842		74,936		1,376,906		—
Loans, net		15,444,752		—		—		15,444,752
Equity securities		28,005		28,005		—		—
Investment in Federal Home Loan Bank stock		18,090		—		18,090		—
Warrants		39		—		—		39
Financial Liabilities
Deposits		14,719,452		—		—		14,719,452
Short-term borrowings		25,683		—		—		25,683
Advances from Federal Home Loan Bank		674,530		—		674,530		—
Other borrowings		30,764		—		—		30,764
Long-term debt		76,058		—		76,058		—