Loans and Allowance for Loan Losses Schedule of Troubled Debt Restructured Loans (Details) $ in Thousands		Dec. 31, 2015 USD ($) loans	Dec. 31, 2014 USD ($) loans
Loans, Modifications [Line Items]
Troubled debt restructured loans	[1]	$ 693	$ 1,019
Number of troubled debt restructured loans included in the nonaccrual category | loans		3	2
Troubled debt restructured loans included in the nonaccrual category		$ 613	$ 643
Commercial loan [Member]
Loans, Modifications [Line Items]
Troubled debt restructured loans	[1]	102	0
Construction, land and land development [Member]
Loans, Modifications [Line Items]
Troubled debt restructured loans	[1]	60	376
1-4 family residential first mortgages [Member]
Loans, Modifications [Line Items]
Troubled debt restructured loans	[1]	86	86
Home equity [Member]
Loans, Modifications [Line Items]
Troubled debt restructured loans	[1]	0	0
Commercial real estate [Member]
Loans, Modifications [Line Items]
Troubled debt restructured loans	[1]	445	557
Consumer and other loans [Member]
Loans, Modifications [Line Items]
Troubled debt restructured loans	[1]	$ 0	$ 0

[1] There were three TDR loans as of December 31, 2015 and two TDR loans as of December 31, 2014, with balances of $613 and $643, respectively, included in the nonaccrual category.