Nature of Business and Summary of Significant Accounting Policies - Additional Information (Details)	6 Months Ended
	Jun. 30, 2017 USD ($) BranchOffice $ / shares	Dec. 31, 2016 USD ($)
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Assets not transferred	$ 200,000
Ownership percentage	100.00%
Number of branch offices | BranchOffice	13
Minimum collection percentage of securities required to be considered as a maturity	85.00%
Period of historical loss experience to estimate allowance for loan losses	12 months
Percentage of largest amount of tax benefits likely to realize	50.00%
Liabilities recorded for uncertainty tax position	$ 0	$ 0
Earnings per share | $ / shares	$ 0
Commercial Real Estate Portfolio Segment
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Period on which interest rate is adjusted	5 years
Minimum
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Percentage of loan to value ratio	65.00%
Minimum | Construction Loans
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Loan term	6 months
Minimum | Commercial Real Estate Portfolio Segment
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Loan amortization period	15 years
Balloon payments period of loan	10 years
Minimum | Commercial Portfolio Segment
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Loan term	5 years
Maximum
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Percentage of loan to value ratio	90.00%
Maximum | Construction Loans
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Loan term	2 years
Maximum | Commercial Real Estate Portfolio Segment
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Percentage of loan to value ratio	75.00%
Loan amortization period	30 years
Balloon payments period of loan	15 years
Maximum | Commercial Portfolio Segment
Nature Of Business And Summary Of Significant Accounting Policies Table Of Statement [Line Items]
Loan term	7 years