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LOANS - Summary of Past Due Loans for Business Activities Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 6,549,787 | $ 5,725,236
Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 2,616,438 | 2,059,767
Commercial real estate | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 287,509 | 253,670
Commercial real estate | Single and multi-family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 317,491 | 251,606
Commercial real estate | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 2,011,438 | 1,554,491
Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,062,038 | 1,048,263
Commercial and industrial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 740,768 | 717,010
Commercial and industrial | Asset based lending |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 321,270 | 331,253
Residential |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,893,131 | 1,815,035
Residential | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 11,982 | 28,055
Residential | 1-4 family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,881,149 | 1,786,980
Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 978,180 | 802,171
Consumer | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 393,800 | 360,605
Consumer | Auto and other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 584,380 | 441,566
Business Activities Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 32,277 | 28,981
Current | 5,189,030 | 4,531,702
Total loans | 5,221,307 | 4,560,683
Past Due greater than 90 days and Accruing | 2,438 | 2,272
Business Activities Loans | 30-59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 8,174 | 8,120
Business Activities Loans | 60-89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 4,849 | 3,105
Business Activities Loans | 90 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 19,254 | 17,756
Business Activities Loans | Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 8,288 | 5,993
Current | 1,918,056 | 1,628,034
Total loans | 1,926,344 | 1,634,027
Past Due greater than 90 days and Accruing | 155 | 0
Business Activities Loans | Commercial real estate | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 58
Current | 253,302 | 210,138
Total loans | 253,302 | 210,196
Past Due greater than 90 days and Accruing | 0 | 0
Business Activities Loans | Commercial real estate | Single and multi-family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 1,352 | 295
Current | 190,467 | 214,528
Total loans | 191,819 | 214,823
Past Due greater than 90 days and Accruing | 155 | 0
Business Activities Loans | Commercial real estate | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 6,936 | 5,640
Current | 1,474,287 | 1,203,368
Total loans | 1,481,223 | 1,209,008
Past Due greater than 90 days and Accruing | 0 | 0
Business Activities Loans | Commercial real estate | 30-59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 1,099 | 1,588
Business Activities Loans | Commercial real estate | 30-59 Days Past Due | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 0
Business Activities Loans | Commercial real estate | 30-59 Days Past Due | Single and multi-family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 618 | 65
Business Activities Loans | Commercial real estate | 30-59 Days Past Due | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 481 | 1,523
Business Activities Loans | Commercial real estate | 60-89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 2,353 | 991
Business Activities Loans | Commercial real estate | 60-89 Days Past Due | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 0
Business Activities Loans | Commercial real estate | 60-89 Days Past Due | Single and multi-family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 110 | 160
Business Activities Loans | Commercial real estate | 60-89 Days Past Due | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 2,243 | 831
Business Activities Loans | Commercial real estate | 90 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 4,836 | 3,414
Business Activities Loans | Commercial real estate | 90 Days Past Due | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 58
Business Activities Loans | Commercial real estate | 90 Days Past Due | Single and multi-family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 624 | 70
Business Activities Loans | Commercial real estate | 90 Days Past Due | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 4,212 | 3,286
Business Activities Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 10,681 | 10,077
Current | 897,421 | 817,155
Total loans | 908,102 | 827,232
Past Due greater than 90 days and Accruing | 5 | 146
Business Activities Loans | Commercial and industrial | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 10,681 | 10,077
Current | 576,151 | 485,902
Total loans | 586,832 | 495,979
Past Due greater than 90 days and Accruing | 5 | 146
Business Activities Loans | Commercial and industrial | Asset based lending |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 0
Current | 321,270 | 331,253
Total loans | 321,270 | 331,253
Past Due greater than 90 days and Accruing | 0 | 0
Business Activities Loans | Commercial and industrial | 30-59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 3,090 | 1,202
Business Activities Loans | Commercial and industrial | 30-59 Days Past Due | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 3,090 | 1,202
Business Activities Loans | Commercial and industrial | 30-59 Days Past Due | Asset based lending |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 0
Business Activities Loans | Commercial and industrial | 60-89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 1,301 | 1,105
Business Activities Loans | Commercial and industrial | 60-89 Days Past Due | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 1,301 | 1,105
Business Activities Loans | Commercial and industrial | 60-89 Days Past Due | Asset based lending |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 0
Business Activities Loans | Commercial and industrial | 90 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 6,290 | 7,770
Business Activities Loans | Commercial and industrial | 90 Days Past Due | Other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 6,290 | 7,770
Business Activities Loans | Commercial and industrial | 90 Days Past Due | Asset based lending |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 0
Business Activities Loans | Residential |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 6,283 | 8,698
Current | 1,588,689 | 1,472,239
Total loans | 1,594,972 | 1,480,937
Past Due greater than 90 days and Accruing | 1,956 | 2,006
Business Activities Loans | Residential | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 10 | 0
Current | 11,168 | 26,704
Total loans | 11,178 | 26,704
Past Due greater than 90 days and Accruing | 0 | 0
Business Activities Loans | Residential | 1-4 family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 6,273 | 8,698
Current | 1,577,521 | 1,445,535
Total loans | 1,583,794 | 1,454,233
Past Due greater than 90 days and Accruing | 1,956 | 2,006
Business Activities Loans | Residential | 30-59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 1,403 | 3,537
Business Activities Loans | Residential | 30-59 Days Past Due | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 10 | 0
Business Activities Loans | Residential | 30-59 Days Past Due | 1-4 family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 1,393 | 3,537
Business Activities Loans | Residential | 60-89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 701 | 857
Business Activities Loans | Residential | 60-89 Days Past Due | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 0
Business Activities Loans | Residential | 60-89 Days Past Due | 1-4 family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 701 | 857
Business Activities Loans | Residential | 90 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 4,179 | 4,304
Business Activities Loans | Residential | 90 Days Past Due | Construction |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 0
Business Activities Loans | Residential | 90 Days Past Due | 1-4 family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 4,179 | 4,304
Business Activities Loans | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 7,025 | 4,213
Current | 784,864 | 614,274
Total loans | 791,889 | 618,487
Past Due greater than 90 days and Accruing | 322 | 120
Business Activities Loans | Consumer | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 3,080 | 2,241
Current | 310,441 | 304,918
Total loans | 313,521 | 307,159
Past Due greater than 90 days and Accruing | 306 | 61
Business Activities Loans | Consumer | Auto and other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 3,945 | 1,972
Current | 474,423 | 309,356
Total loans | 478,368 | 311,328
Past Due greater than 90 days and Accruing | 16 | 59
Business Activities Loans | Consumer | 30-59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 2,582 | 1,793
Business Activities Loans | Consumer | 30-59 Days Past Due | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 99 | 563
Business Activities Loans | Consumer | 30-59 Days Past Due | Auto and other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 2,483 | 1,230
Business Activities Loans | Consumer | 60-89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 494 | 152
Business Activities Loans | Consumer | 60-89 Days Past Due | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 0 | 20
Business Activities Loans | Consumer | 60-89 Days Past Due | Auto and other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 494 | 132
Business Activities Loans | Consumer | 90 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 3,949 | 2,268
Business Activities Loans | Consumer | 90 Days Past Due | Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 2,981 | 1,658
Business Activities Loans | Consumer | 90 Days Past Due | Auto and other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | $ 968 | $ 610

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