Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 283,561	$ 640,536
Ending Balance	683,866	283,561
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(35,701)	5,689
Unrealized gains (losses)	47,550	(41,675)
Amounts reclassified from AOCI	2,309	285
Ending Balance	14,158	(35,701)
Derivative instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(3,891)	(2,564)
Unrealized gains (losses)	200	(3,076)
Amounts reclassified from AOCI	1,928	1,749
Ending Balance	(1,763)	(3,891)
Pension, postretirement and other post-employment benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(31,459)	8,273
Unrealized gains (losses)	47,159	(38,533)
Amounts reclassified from AOCI	403	(1,199)
Ending Balance	16,103	(31,459)
Available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(351)	(20)
Unrealized gains (losses)	191	(66)
Amounts reclassified from AOCI	(22)	(265)
Ending Balance	$ (182)	$ (351)