SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Loans and Allowance for Loan Losses
Period past due for loans to be considered as delinquent	30 days
Minimum period loans are past due as condition for determining whether impaired	90 days
Mortgage Servicing Rights
Amortization on the servicing asset	$ 574,000	$ 369,000
Loans serviced for others	322,920,000us-gaap_ServicingAssetAtFairValueAmount	248,491,000us-gaap_ServicingAssetAtFairValueAmount
Mortgage Banking
Derivative Financial Instruments
Revision in accounting estimate	706,000
Minimum
Derivative Financial Instruments
Period between issuance of a loan commitment and closing and sale of the loan	30 days
Maximum
Derivative Financial Instruments
Period between issuance of a loan commitment and closing and sale of the loan	120 days
Interest rate cap
Interest rate cap
Notional amount	100,000,000
Transaction term	5 years
Number of quarterly caps	20
Fixed cost	$ 1,500,000
Interest rate cap \| LIBOR
Interest rate cap
Description of variable rate basis	3 month Libor
Strike price	3.00%

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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- Definition

Represents the earnings effect due to change in accounting estimate.

+ References

No definition available.

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- Definition

Represents the fixed cost incurred in the interest rate cap.

+ References

No definition available.

+ Details

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- Definition

The reference rate for the variable rate of the interest rate derivative, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Details

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- Definition

Minimum period that loans are past due that is used as a condition for determining whether it is impaired.

+ References

No definition available.

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- Definition

Represents the number of quarterly interest rate caps.

+ References

No definition available.

+ Details

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- Definition

Represents the period between issuance of a loan commitment and closing and sale of loan.

+ References

No definition available.

+ Details

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- Definition

Represents the period past due for loans to be considered as delinquent.

+ References

No definition available.

+ Details

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- Definition

Represents the term of the rate protection transaction entered in to by the company.

+ References

No definition available.

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- Details

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- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

+ References

No definition available.

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- Details

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- Definition

Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746

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