Investments In Securities and Fair Value (Schedule of Cost-method Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items]
Equity investments in unconsolidated affiliates, measurement alternative	$ 7,920	$ 8,166
Notes receivable, fair value disclosure	929	641
Other assets, fair value disclosure	8,849	8,807
Level 1
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items]
Equity investments in unconsolidated affiliates, measurement alternative	0	0
Notes receivable, fair value disclosure	0	0
Other assets, fair value disclosure	0	0
Level 2
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items]
Equity investments in unconsolidated affiliates, measurement alternative	0	0
Notes receivable, fair value disclosure	0	0
Other assets, fair value disclosure	0	0
Level 3
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items]
Equity investments in unconsolidated affiliates, measurement alternative	7,920	8,166
Notes receivable, fair value disclosure	929	641
Other assets, fair value disclosure	$ 8,849	$ 8,807