Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Cash and cash equivalents, Carrying Amount	$ 183,513	$ 230,933	$ 126,203	$ 228,110
Investment securities, Carrying Amount	435,391	441,534
Loans, net, Carrying Amount	780,046	711,362
Accrued interest receivable, Carrying Amount	7,180	7,069
Assets, Carrying Amount	1,406,130	1,390,898
Cash and cash equivalents, Fair Value	183,513	230,933
Investment securities, Fair Value	435,391	441,534
Loans, net, Fair Value	782,301	711,090
Accrued interest receivable, Fair Value	7,180	7,069
Assets, Fair Value	1,408,385	1,390,626
Deposits, Carrying Amount	636,629	721,926
Accounts and drafts payable, Carrying Amount	794,871	694,360
Accrued interest payable, Carrying Amount	191	91
Liabilities, Carrying Amount	1,431,691	1,416,377
Deposits, Fair Value	637,586	722,018
Accounts and drafts payable, Fair Value	794,871	694,360
Accrued interest payable, Fair Value	191	91
Liabilities, Fair Value	$ 1,432,648	$ 1,416,469