LOAN SERVICING - Characteristics and Sensitivity of the Fair Value of MSRs (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Servicing Liabilities at Fair Value [Line Items]
Government-guaranteed lending	$ 12,729	$ 9,450	$ 5,586
Mortgage Loan Servicing
Servicing Liabilities at Fair Value [Line Items]
Composition of mortgage loans serviced for others (as a percent)	100.00%	100.00%
Weighted average life (years)	6 years 7 months 6 days	5 years 9 months 7 days
Prepayment speed (as a percent)	9.98%	12.62%
Discount rate (as a percent)	9.66%	9.60%
0.25%	$ 421	$ 566
0.50%	660	801
- 0.25%	(599)	(668)
- 0.50%	(1,104)	(844)
Unpaid principal balance	$ 563,802	$ 455,033
Mortgage Loan Servicing \| Fixed rate loans
Servicing Liabilities at Fair Value [Line Items]
Composition of mortgage loans serviced for others (as a percent)	99.90%	99.86%
Mortgage Loan Servicing \| Adjustable rate loans
Servicing Liabilities at Fair Value [Line Items]
Composition of mortgage loans serviced for others (as a percent)	0.10%	0.14%
SBA Loans
Servicing Liabilities at Fair Value [Line Items]
Unpaid principal balance	$ 205,879	$ 136,093
Government-guaranteed lending	$ 1,758	$ 1,063	$ 522

Government Guaranteed Lending, Non-Interest Income

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Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 0.25 Percent Adverse Change in Discount Rate

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Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 0.25 Percent Positive Change in Discount Rate

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Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 0.50 Percent Adverse Change in Discount Rate

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- Definition

Servicing Assets, Unpaid Principal Balance

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Servicing Assets and Servicing Liabilities, Percentage of Total

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Discount rate used to estimate the fair value of servicing assets and servicing liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=56950315&loc=d3e122596-111746

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Estimated rate of prepayments of principal on servicing assets and servicing liabilities.

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Weighted average life of financial assets and financial liabilities, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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