Note 5 - Employee Benefit Plans (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2026

Dec. 31, 2025

Table Text Block [Abstract]

Schedule of net periodic pension cost

Net periodic pension cost for the plans consisted of the following for the three months ended March 31, 2026 and 2025 (in thousands):


		Three Months Ended March 31,
		2026				2025
Service cost		$	999			$	1,068
Interest cost			2,181				2,094
Expected return on plan assets			(2,969	)			(3,251	)
Amortization of prior service cost			20				20
Amortization of net loss			—				326
Net periodic pension cost		$	231			$	257

Net periodic pension cost for the plans consisted of the following in 2025, 2024, and 2023 (in thousands):


		Pension Benefits
		2025				2024				2023
Service cost		$	4,270			$	3,659			$	3,794
Interest cost			8,377				8,302				7,974
Expected return on plan assets			(10,187	)			(12,544	)			(12,428	)
Amortization of prior service cost			82				265				500
Amortization of net loss (gain)			2,030				61				(188	)
Net periodic pension (benefit) cost		$	4,572			$	(257	)		$	(348	)