Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Employee benefit accruals	$ 7,828	$ 10,529
Impairment of investments	12,337	13,961
Impact of timing of settlement payments	10,854	20,137
Various U.S. federal and state tax loss carryforwards	2,378	3,123
Operating lease liabilities	3,277	3,884
Current expected credit losses	4,111	4,299
Other	3,910	2,852
Deferred tax assets	44,695	58,785
Less: Valuation allowance	(348)	(852)
Net deferred tax assets	44,347	57,933
Deferred tax liabilities:
Basis differences on non-consolidated entities	(24,441)	(22,809)
Basis differences on fixed and intangible assets	(35,154)	(35,555)
Basis differences on inventory	(10,808)	(10,698)
Basis differences on long-term investments	(4,383)	(912)
Basis differences on available for sale securities	(1,490)	(3,579)
Operating lease right of use assets	(2,839)	(3,324)
Deferred tax liabilities	(79,115)	(76,877)
Net deferred tax liabilities	$ (34,768)	$ (18,944)