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LOANS (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 6,549,787	$ 5,725,236
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,678,476	3,108,030
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,616,438	2,059,767
Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	287,509	253,670
Commercial real estate | Single and multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	317,491	251,606
Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,011,438	1,554,491
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,062,038	1,048,263
Commercial and industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	740,768	717,010
Commercial and industrial | Asset based lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	321,270	331,253
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,893,131	1,815,035
Residential | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	11,982	28,055
Residential | 1-4 family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,881,149	1,786,980
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	978,180	802,171
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	393,800	360,605
Consumer | Auto and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	584,380	441,566
Business Activities Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	5,221,307	4,560,683
Business Activities Loans | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,834,446	2,461,259
Business Activities Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,926,344	1,634,027
Business Activities Loans | Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	253,302	210,196
Business Activities Loans | Commercial real estate | Single and multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	191,819	214,823
Business Activities Loans | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,481,223	1,209,008
Business Activities Loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	908,102	827,232
Business Activities Loans | Commercial and industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	586,832	495,979
Business Activities Loans | Commercial and industrial | Asset based lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	321,270	331,253
Business Activities Loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,594,972	1,480,937
Business Activities Loans | Residential | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	11,178	26,704
Business Activities Loans | Residential | 1-4 family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,583,794	1,454,233
Business Activities Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	791,889	618,487
Business Activities Loans | Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	313,521	307,159
Business Activities Loans | Consumer | Auto and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	478,368	311,328
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,328,480	1,164,553
Acquired Loans | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	844,030	646,771
Acquired Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	690,094	425,740
Acquired Loans | Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	34,207	43,474
Acquired Loans | Commercial real estate | Single and multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	125,672	36,783
Acquired Loans | Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	530,215	345,483
Acquired Loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	153,936	221,031
Acquired Loans | Commercial and industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	153,936	221,031
Acquired Loans | Commercial and industrial | Asset based lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0	0
Acquired Loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	298,159	334,098
Acquired Loans | Residential | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	804	1,351
Acquired Loans | Residential | 1-4 family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	297,355	332,747
Acquired Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	186,291	183,684
Acquired Loans | Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	80,279	53,446
Acquired Loans | Consumer | Auto and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 106,012	$ 130,238

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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

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