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Mortgage Banking (Schedule of Mortgage Servicing) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Servicing Asset at Amortized Cost, Balance [Roll Forward]      
Balance at beginning of year $ 1,025,000 $ 1,210,000 $ 2,161,000
Capitalized servicing right fees upon sale(1) [1] 0 22,000 9,000
Amortization charged against mortgage servicing fee income(1) [1] (200,000) (430,000) (734,000)
Valuation adjustment 6,000 (223,000) 226,000
Balance at end of year 831,000 1,025,000 1,210,000
Valuation Allowance:      
Balance at beginning of year (7,000) (230,000) (4,000)
Decrease (increase) in impairment reserve(1) [1] 6,000 223,000 (226,000)
Balance at end of year (1,000) (7,000) (230,000)
Fair value, beginning of year 1,766,000 1,701,000 2,947,000
Fair value, end of year $ 1,677,000 $ 1,766,000 $ 1,701,000
[1] Reported within mortgage banking income, net on the Company's consolidated statements of income.