OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Nature of Business, Loan Charge-off Policies, and Loans Held for Sale (Details)	12 Months Ended
Dec. 31, 2015 segment office
Accounting Policies [Abstract]
Number of offices \| office	23
Number of reportable segments	1
Number of operating segments	1
Number of days loan is past due unless both well secured and in process of collection	180 days
Minimum
Loans held for sale
Short holding period for loans held for sale (less than 2 weeks)	14 days
Maximum
Loans held for sale
Short holding period for loans held for sale (less than 2 weeks)	30 days

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration