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LOAN LOSS ALLOWANCE- Summary of Loans Rated Special Mention or Lower (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | $ 6,549,787 | $ 5,725,236
Non-Accrual |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 22,240 | 20,875
Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 95,302 | 93,109
Total Classified |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 117,542 | 113,984
Special mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 11,802 | 31,295
Total Criticized |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 129,344 | 145,279
Business Activities Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 5,221,307 | 4,560,683
Business Activities Loans | Non-Accrual |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 16,816 | 15,484
Business Activities Loans | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 51,125 | 60,549
Business Activities Loans | Total Classified |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 67,941 | 76,033
Business Activities Loans | Special mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 7,479 | 29,036
Business Activities Loans | Total Criticized |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 75,420 | 105,069
Acquired Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 1,328,480 | 1,164,553
Acquired Loans | Non-Accrual |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 5,424 | 5,391
Acquired Loans | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 44,177 | 32,560
Acquired Loans | Total Classified |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 49,601 | 37,951
Acquired Loans | Special mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | 4,323 | 2,259
Acquired Loans | Total Criticized |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans | $ 53,924 | $ 40,210

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5074-111524 + Details
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