LOANS AND ALLOWANCE FOR LOAN LOSSES - Financing Receivables Purchased and/or Sold, by Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 355,343	$ 37,120
Sales	256,946	243,230
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	14,241	2,761
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	138,896	4,484
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	201,397	28,090
Sales	256,946	243,230
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 809	$ 1,785

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.

No definition available.

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- Definition

The cash outflow from (a) purchases of loans held-for-investment, (b) purchases of leases held-for-investment, and (c) both.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

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- Definition

The net cash inflow from (a) sales of loans held-for-investment, (b) sales of leases held-for-investment, and (c) both. Includes proceeds from securitizations of loans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

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