Pension and Other Postretirement Benefits (Details 10) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pensions [Member]
Pension and other postretirement benefits expenses
Service cost		$ 5,689	$ 6,547	$ 6,269
Interest cost		14,108	12,749	15,084
Expected return on plan assets		(28,944)	(27,858)	(29,698)
Amortization of prior service cost		387	332	359
Recognized losses		12,710	16,006	13,626
Curtailment loss/(gain)	$ 1,158	1,158	(133)	484
Settlement (gain)/loss		(605)	205	549
Special termination benefits	$ 395	395	0	0
Net periodic benefit cost		4,898	7,848	6,673
Other Postretirement Benefits [Member]
Pension and other postretirement benefits expenses
Service cost		77	103	81
Interest cost		808	819	1,041
Expected return on plan assets		0	0	0
Amortization of prior service cost		36	29	27
Recognized losses		(2)	258	35
Curtailment loss/(gain)		0	0	0
Settlement (gain)/loss		0	0	0
Special termination benefits		0	0	0
Net periodic benefit cost		$ 919	$ 1,209	$ 1,184