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Goodwill and Intangible Assets Mortgage Servicing Rights (Details) - USD ($)
6 Months Ended 12 Months Ended
May 01, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]          
Mortgage Servicing Rights (MSR) Impairment (Recovery)   $ (439,000)      
Mortgage Servicing Rights [Member]          
Finite-Lived Intangible Assets [Line Items]          
Finite-lived Intangible Assets Acquired   0 $ 425,000 $ 1,558,000  
Capitalization Of Mortgage Servicing Rights   0 7,000 7,000  
Mortgage Servicing Rights (MSR) Impairment (Recovery)   (439,000)      
Amortization of Mortgage Servicing Rights   (172,000) (119,000) (308,000)  
MSR Interest Only Strip   146,000      
Finite-Lived Intangible Assets, Net   $ 1,636,000 $ 1,157,000 $ 2,101,000 $ 844,000
First BancTrust [Member] | Mortgage Servicing Rights [Member]          
Finite-Lived Intangible Assets [Line Items]          
Finite-lived Intangible Assets Acquired $ 1,558,000