Note 15 - Financial Derivatives (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

	March 31, 2023			December 31, 2022
Fair value swap hedges:	(In thousands)
Notional	$	807,332		$	874,034
Weighted average fixed rate-pay		1.92	%		2.12	%
Weighted average variable rate spread		0.44	%		0.68	%
Weighted average variable rate-receive		5.04	%		2.61	%
Net unrealized gain (1)	$	29,815		$	38,589

	Three months ended
	March 31, 2023		March 31, 2022
Periodic net settlement of swaps (2)	$	6,336	$	(1,762	)

Derivatives Not Designated as Hedging Instruments [Table Text Block]

	March 31, 2023			December 31, 2022
	(In thousands)
Derivative financial instruments not designated as hedging instruments:
Notional amounts:
Forward, and swap contracts with positive fair value	$	234,733		$	72,996
Forward, and swap contracts with negative fair value	$	42,753		$	170,213
Fair value:
Forward, and swap contracts with positive fair value	$	975		$	448
Forward, and swap contracts with negative fair value	$	(429	)	$	(942	)