Income Taxes (Deferred Income Taxes Components) (Details 4) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred Income Tax Liabilities [Line Items]
Employee benefit obligations	$ 53,307	$ 64,258
Accounts receivable	3,770	3,554
State income tax loss carryforwards	61,826	63,050
U.S. Federal income tax loss carryforwards	64,310	69,509
Non-U.S. income tax loss carryforwards	19,937	18,877
Leases	59,072	63,715
Other	2,350	6,396
Deferred tax assets	269,758	294,654
Valuation allowance	(62,816)	(57,603)
Deferred tax assets, net	206,942	237,051
Unrealized gain on marketable equity securities	87,204	138,868
Goodwill and other intangible assets	81,593	103,497
Property, plant and equipment	19,703	15,451
Leases	49,473	51,668
Non-U.S. withholding tax	2,084	2,001
Deferred tax liabilities	666,405	905,857
Deferred Income Tax Liabilities, Net	459,463	668,806
non-U.S. [Member]
Deferred Income Tax Liabilities [Line Items]
Capital loss carryforwards	3,458	3,707
Non-U.S. income tax loss carryforwards	19,900
Valuation allowance	(18,200)
U.S. Federal [Member]
Deferred Income Tax Liabilities [Line Items]
U.S. Federal income tax loss carryforwards	64,300
U.S Federal foreign income tax credit carryforwards	1,271	970
State [Member]
Deferred Income Tax Liabilities [Line Items]
State income tax loss carryforwards	61,800
Capital loss carryforwards	36	107
Income tax credit carryforwards	421	511
Valuation allowance	(43,200)
Pension Plan [Member]
Deferred Income Tax Liabilities [Line Items]
Prepaid pension cost	$ 426,348	$ 594,372