Note 12 - Pension and Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

		*Pension Plan and SERP*								*Postretirement Plan*
		*For the Three Months Ended June 30,*
		*2025*				*2024*				*2025*				*2024*
Interest cost		$	3.8			$	3.5			$	—			$	0.1
Expected return on plan assets			(6.3	)			(6.2	)			—				(0.1	)
Amortization of prior service cost			—				0.2				—				—
Amortization of net actuarial loss			1.0				0.8				0.1				0.2
Net periodic (benefit) cost		$	(1.5	)		$	(1.7	)		$	0.1			$	0.2
Employer contributions/(reimbursement), net		$	0.1			$	0.2			$	(0.3	)		$	0.3

		*Pension Plan and SERP*								*Postretirement Plan*
		*For the Six Months Ended June 30,*
		*2025*				*2024*				*2025*				*2024*
Interest cost		$	7.5			$	7.6			$	0.1			$	0.1
Expected return on plan assets			(12.5	)			(12.6	)			(0.1	)			(0.1	)
Amortization of prior service cost			0.1				0.2				—				—
Amortization of net actuarial loss			1.9				1.7				0.2				0.3
Net periodic (benefit) cost		$	(3.0	)		$	(3.1	)		$	0.2			$	0.3
Employer contributions/(reimbursement), net		$	0.2			$	0.4			$	(2.7	)		$	0.5