Fair Value - Summary of Carrying Amounts, Estimated Fair Values and Assumptions Used to Estimate Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financial Liabilities:
Interest bearing deposits	$ 916,368	$ 900,677
Carrying Value [Member]
Financial Assets:
Net loans held for investment		1,032,418
Financial Liabilities:
Interest bearing deposits		900,677
Estimated Fair Value [Member]
Financial Assets:
Net loans held for investment		1,029,540
Financial Liabilities:
Interest bearing deposits		$ 901,211