Accumulated Other Comprehensive Loss (Reclassification out of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense									$ (110,094)	$ (98,769)	$ (87,306)
Financing revenue	$ 516,121	$ 499,463	$ 489,745	$ 521,269	$ 526,416	$ 503,033	$ 500,831	$ 548,645	2,026,598	2,078,925	2,482,883
Other components of net pension and postretirement cost									89,044	(8,256)	4,308
(Loss) income from continuing operations before income taxes	(48,197)	(43,880)	(7,854)	47,604	(62,552)	26,927	(32,740)	24,445	(52,327)	(43,920)	188,652
Tax provision	6,134	166,466	(2,271)	(15,500)	984	(9,115)	(2,628)	(6,588)	154,829	(17,347)	(42,956)
Net (loss) income	$ (37,373)	$ (138,472)	$ (24,867)	$ (2,885)	$ (223,836)	$ (12,519)	$ (141,535)	$ (7,737)	(203,597)	(385,627)	36,940
Amounts Reclassified from AOCI | Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of sales									0	(33)	178
Interest expense									10,124	9,708	549
(Loss) income from continuing operations before income taxes									10,124	9,675	727
Tax provision									2,531	2,419	181
Net (loss) income									7,593	7,256	546
Amounts Reclassified from AOCI | Available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Financing revenue									(4,851)	(11)	(9)
Tax provision									(1,213)	(3)	(2)
Net (loss) income									(3,638)	(8)	(7)
Amounts Reclassified from AOCI | Pension and postretirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
(Loss) income from continuing operations before income taxes									(117,178)	(18,193)	(40,601)
Tax provision									(29,019)	(4,461)	(9,315)
Net (loss) income									(88,159)	(13,732)	(31,286)
Amounts Reclassified from AOCI | Prior service costs
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other components of net pension and postretirement cost									(278)	(266)	(208)
Amounts Reclassified from AOCI | Actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other components of net pension and postretirement cost									(25,476)	(17,181)	(39,999)
Amounts Reclassified from AOCI | Settlement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other components of net pension and postretirement cost									$ (91,424)	$ (746)	$ (394)