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Goodwill and Intangible Assets (Schedule of Carrying Amount and Accumulated Amortization of Intangible Asset) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]    
Intangible assets with indefinite lives $ 20,791 $ 13,306
Intangible assets subject to amortization:    
Gross carrying amount 106,330 95,739
Accumulated amortization (55,572) (51,966)
Intangible assets subject to amortization, net 50,758 43,773
Net balance at end of period 71,549 57,079
Customer and Referral Relationships [Member]    
Intangible assets subject to amortization:    
Gross carrying amount 44,672 48,028
Accumulated amortization (34,439) (35,665)
Intangible assets subject to amortization, net 10,233 12,363
Net balance at end of period 10,233 12,363
Trade Names and Trademarks [Member]    
Intangible assets subject to amortization:    
Gross carrying amount 42,926 31,036
Accumulated amortization (15,191) (12,941)
Intangible assets subject to amortization, net 27,735 18,095
Net balance at end of period 27,735 18,095
Non-competition Agreements [Member]    
Intangible assets subject to amortization:    
Gross carrying amount 6,225 4,655
Accumulated amortization (2,887) (2,234)
Intangible assets subject to amortization, net 3,338 2,421
Net balance at end of period 3,338 2,421
State Licenses [Member]    
Finite Lived Intangible Assets [Line Items]    
Intangible assets with indefinite lives 20,791 13,306
Intangible assets subject to amortization:    
Gross carrying amount 12,507 12,020
Accumulated amortization (3,055) (1,126)
Intangible assets subject to amortization, net 9,452 10,894
Net balance at end of period $ 30,243 $ 24,200