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Goodwill and Intangibles (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Goodwill [Line Items]      
Amortization of Intangible Assets $ 487,000 $ 404,000  
Goodwill 21,476,000   $ 21,476,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Goodwill 0    
Goodwill, Impairment Loss $ 0 $ 0 $ 2,403,000