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Business Combinations, Intangible Assets and Goodwill Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Referral relationships $ 6,416 $ 6,416
Non-complete agreements 1,406 1,406
Tradename 560 560
Identifiable intangible assets, gross 8,382 8,382
Accumulated amortization (1,952) (1,375)
Identifiable intangible assets, net $ 6,430 $ 7,007