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Summary of Significant Accounting Policies (Other Expense, Net) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]      
Write-off of deposits and pre-acquisition costs $ (12,283,000) $ (12,390,000) $ (13,116,000)
Amortization of intangible assets (16,502,000) (19,685,000) (14,200,000)
Interest income 1,953,000 6,837,000 16,739,000
Interest expense (502,000) (4,248,000) (584,000)
Equity in earnings of unconsolidated entities 17,199,000 1,880,000 747,000
Miscellaneous, net 7,725,000 9,780,000 1,865,000
Total other expense, net $ (2,410,000) $ (17,826,000) $ (8,549,000)