Employee Benefits Employee Stock Ownership Plan (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Employee Stock Ownership Plan [Abstract]
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares	481,459	441,654
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares	19,780	39,805
Employee Stock Ownership Plan (ESOP), Number of Suspense Shares	86,954	106,734
Employee Stock Ownership Plan (ESOP), Shares in ESOP	588,193	588,193
Employee Stock Ownership Plan (ESOP), Deferred Shares, Fair Value	$ 1,679	$ 2,809