Concentrations of Credit Risk (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Loans secure to total loans portfolio	$ 1,344,671	$ 1,322,522
Real Estate \| Credit Concentration Risk
Concentration Risk [Line Items]
Loans secure to total loans portfolio	$ 1,066,411	$ 1,080,031
Percentage of loans secure to total loans portfolio	78.60%	80.80%
Commercial Real Estate \| Credit Concentration Risk
Concentration Risk [Line Items]
Loans secure to total loans portfolio	$ 655,800	$ 637,701
Percentage of loans secure to total loans portfolio	48.30%	47.70%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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