Loans, Net - Recorded investment in nonaccrual loans and loans past due and still accruing by class of loans (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 8,359	$ 8,784
Past due 90 days or more and still accruing	781	278
Real Estate Loans Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	29	204
Past due 90 days or more and still accruing	0	0
Real Estate Loans Secured by 1 - 4 Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	296	4,460
Past due 90 days or more and still accruing	303	0
Other Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,976	1,186
Past due 90 days or more and still accruing	128	248
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	4,187	1,036
Past due 90 days or more and still accruing	350	30
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,871	1,898
Past due 90 days or more and still accruing	$ 0	$ 0