Fair Value Measurements (Summarized Information About Level 3 Fair Value Measurements) (Details) - Level 3 - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Convertible Preferred Securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value measurement with unobservable input	$ 16,278	$ 11,618	$ 8,849
Recurring | Convertible Preferred Securities | Market approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value measurement with unobservable input	16,278	11,618
Nonrecurring | Grain Assets | Third party appraisal
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value measurement with unobservable input	$ 9,000
Nonrecurring | Frac Sand Assets | Third party appraisal
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value measurement with unobservable input		2,946
Nonrecurring | Real Property | Market approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value measurement with unobservable input		$ 700