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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Schedule of Loans and Leases Receivable (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 5,184,394 | $ 3,949,122 |  |
Allowance for loan and lease losses | (35,533) | (29,480) | $ (18,805) | $ (14,448)
Loans and leases receivable, net | $ 5,148,861 | $ 3,919,642 |  |
Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Concentration risk percentage | 100.00% | 100.00% |  |
Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 712,731 | $ 246,897 |  |
Allowance for loan and lease losses | $ (206) | $ (23) |  |
Purchased Credit Impaired | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Concentration risk percentage | 13.70% | 6.30% |  |
Non-Traditional Mortgages |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 785,908 | $ 350,575 |  |
Non-Traditional Mortgages | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Concentration risk percentage | 15.20% | 8.90% |  |
Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 3,685,755 | $ 3,351,650 |  |
Traditional Loans | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Concentration risk percentage | 71.10% | 84.80% |  |
Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 4,471,663 | $ 3,702,225 |  |
Total NTM and Traditional Loans | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Concentration risk percentage | 86.30% | 93.70% |  |
Construction | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 55,289 | $ 42,198 |  |
Commercial | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 876,999 | 490,900 |  |
Allowance for loan and lease losses | (5,850) | (6,910) | (1,822) |
Commercial | Commercial and industrial | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 853 | 1,134 |  |
Allowance for loan and lease losses | (58) | 0 |  |
Commercial | Commercial and industrial | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 876,146 | 489,766 |  |
Commercial | Commercial and industrial | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 876,146 | 489,766 |  |
Commercial | Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 727,707 | 999,857 |  |
Allowance for loan and lease losses | (4,252) | (3,840) | (5,484) |
Commercial | Commercial real estate | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 9,599 | 11,527 |  |
Allowance for loan and lease losses | (112) | (6) |  |
Commercial | Commercial real estate | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 718,108 | 988,330 |  |
Commercial | Commercial real estate | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 718,108 | 988,330 |  |
Commercial | Multi-family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 904,300 | 955,683 |  |
Allowance for loan and lease losses | (6,012) | (7,179) | (2,566) |
Commercial | Multi-family | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 0 | 0 |  |
Allowance for loan and lease losses | 0 | 0 |  |
Commercial | Multi-family | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 904,300 | 955,683 |  |
Commercial | Multi-family | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 904,300 | 955,683 |  |
Commercial | SBA |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 57,706 | 36,155 |  |
Allowance for loan and lease losses | (683) | (335) | (235) |
Commercial | SBA | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 3,049 | 3,157 |  |
Allowance for loan and lease losses | (19) | 0 |  |
Commercial | SBA | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 54,657 | 32,998 |  |
Commercial | SBA | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 54,657 | 32,998 |  |
Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 55,289 | 42,198 |  |
Allowance for loan and lease losses | (1,530) | (846) | (244) |
Commercial | Construction | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 0 | 0 |  |
Allowance for loan and lease losses | 0 | 0 |  |
Commercial | Construction | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 55,289 | 42,198 |  |
Commercial | Construction | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 55,289 | 42,198 |  |
Commercial | Lease financing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 192,424 | 85,749 |  |
Allowance for loan and lease losses | (2,195) | (873) | $ (428) |
Commercial | Lease financing | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 0 | 0 |  |
Allowance for loan and lease losses | 0 | 0 |  |
Commercial | Lease financing | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 192,424 | 85,749 |  |
Commercial | Lease financing | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 192,424 | 85,749 |  |
Consumer | Non-Traditional Mortgages |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 785,908 | $ 350,575 |  |
Consumer | Non-Traditional Mortgages | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Concentration risk percentage | 15.20% | 8.90% |  |
Consumer | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | $ 3,351,650 |  |
Consumer | Green Loans (HELOC) - first liens | Non-Traditional Mortgages |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 781,091 | 345,483 |  |
Consumer | Green Loans (HELOC) - second liens | Non-Traditional Mortgages |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 4,817 | 5,092 |  |
Consumer | Single family residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 2,150,453 | 1,048,485 |  |
Consumer | Single family residential mortgage | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 699,230 | 231,079 |  |
Consumer | Single family residential mortgage | Non-Traditional Mortgages |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 675,960 | 222,306 |  |
Consumer | Single family residential mortgage | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 775,263 | 595,100 |  |
Consumer | Single family residential mortgage | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 1,451,223 | 817,406 |  |
Consumer | Home equity loans | Green Loans (HELOC) - first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 105,131 | 123,177 |  |
Consumer | Home equity loans | Green Loans (HELOC) - first liens | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 0 | 0 |  |
Consumer | Home equity loans | Green Loans (HELOC) - first liens | Non-Traditional Mortgages |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 105,131 | 123,177 |  |
Consumer | Home equity loans | Green Loans (HELOC) - first liens | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 0 | 0 |  |
Consumer | Home equity loans | Green Loans (HELOC) - first liens | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 105,131 | 123,177 |  |
Consumer | Home equity loans | Green Loans (HELOC) - second liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 4,704 | 4,979 |  |
Consumer | Home equity loans | Green Loans (HELOC) - second liens | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 0 | 0 |  |
Consumer | Home equity loans | Green Loans (HELOC) - second liens | Non-Traditional Mortgages |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 4,704 | 4,979 |  |
Consumer | Home equity loans | Green Loans (HELOC) - second liens | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 0 | 0 |  |
Consumer | Home equity loans | Green Loans (HELOC) - second liens | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 4,704 | 4,979 |  |
Consumer | Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 109,681 | 161,939 |  |
Consumer | Other consumer | Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 0 | 0 |  |
Consumer | Other consumer | Non-Traditional Mortgages |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 113 | 113 |  |
Consumer | Other consumer | Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | 109,568 | 161,826 |  |
Consumer | Other consumer | Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | $ 109,681 | $ 161,939 |  |

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