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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Schedule of Loans and Leases Receivable (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | $ 6,105,321 | $ 6,034,752 | $ 5,463,068 |
Allowance for loan and lease losses | (42,736) | (40,444) | (35,845) | $ (35,533)
Loans and leases receivable, net | 6,062,585 | 5,994,308 |  |
Purchased Credit Impaired |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 139,699 | 141,826 | 683,976 |
Allowance for loan and lease losses | (161) |  | (206) |
Non-Traditional Mortgages (NTM) |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 818,010 | 885,148 |  |
Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 5,147,612 | 5,007,778 |  |
Traditional Loans | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 142,164 | 125,100 |  |
Total NTM and Traditional Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 5,965,622 | 5,892,926 |  |
Commercial | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,585,656 | 1,522,960 | 983,961 |
Allowance for loan and lease losses | (10,888) | (7,584) | (6,046) | (5,850)
Commercial | Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 750,592 | 729,959 | 713,693 |
Allowance for loan and lease losses | (4,543) | (5,467) | (3,969) | (4,252)
Commercial | Multi-family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,449,715 | 1,365,262 | 1,021,097 |
Allowance for loan and lease losses | (11,029) | (11,376) | (6,484) | (6,012)
Commercial | SBA |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 76,040 | 73,840 | 71,640 |
Allowance for loan and lease losses | (1,146) | (939) | (906) | (683)
Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 142,164 | 125,100 | 68,241 |
Allowance for loan and lease losses | (3,018) | (2,015) | (1,520) | (1,530)
Commercial | Lease financing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 285 | 379 | 212,836 |
Allowance for loan and lease losses | (5) | (6) | (2,610) | $ (2,195)
Commercial | Purchased Credit Impaired | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 4,687 | 4,760 | 819 |
Allowance for loan and lease losses | 0 |  | (58) |
Commercial | Purchased Credit Impaired | Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,152 | 1,182 | 8,218 |
Allowance for loan and lease losses | (5) |  | (112) |
Commercial | Purchased Credit Impaired | Multi-family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 | 0 |
Allowance for loan and lease losses | 0 |  | 0 |
Commercial | Purchased Credit Impaired | SBA |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 2,607 | 2,672 | 2,940 |
Allowance for loan and lease losses | (19) |  | (19) |
Commercial | Purchased Credit Impaired | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 | 0 |
Allowance for loan and lease losses | 0 |  | 0 |
Commercial | Purchased Credit Impaired | Lease financing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 | 0 |
Allowance for loan and lease losses | 0 |  | $ 0 |
Commercial | Non-Traditional Mortgages (NTM) | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial | Non-Traditional Mortgages (NTM) | Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial | Non-Traditional Mortgages (NTM) | Multi-family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial | Non-Traditional Mortgages (NTM) | SBA |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial | Non-Traditional Mortgages (NTM) | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial | Non-Traditional Mortgages (NTM) | Lease financing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial | Traditional Loans | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,580,969 | 1,518,200 |  |
Commercial | Traditional Loans | Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 749,440 | 728,777 |  |
Commercial | Traditional Loans | Multi-family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,449,715 | 1,365,262 |  |
Commercial | Traditional Loans | SBA |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 73,433 | 71,168 |  |
Commercial | Traditional Loans | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 142,164 | 125,100 |  |
Commercial | Traditional Loans | Lease financing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 285 | 379 |  |
Commercial | Total NTM and Traditional Loans | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,580,969 | 1,518,200 |  |
Commercial | Total NTM and Traditional Loans | Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 749,440 | 728,777 |  |
Commercial | Total NTM and Traditional Loans | Multi-family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,449,715 | 1,365,262 |  |
Commercial | Total NTM and Traditional Loans | SBA |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 73,433 | 71,168 |  |
Commercial | Total NTM and Traditional Loans | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 142,164 | 125,100 |  |
Commercial | Total NTM and Traditional Loans | Lease financing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 285 | 379 |  |
Consumer | Single family residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,889,390 | 2,019,161 |  |
Consumer | Home equity loan | Green Loans (HELOC) - first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 85,665 | 87,469 |  |
Consumer | Home equity loan | Green Loans (HELOC) - second liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 3,549 | 3,559 |  |
Consumer | Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 122,265 | 107,063 |  |
Consumer | Purchased Credit Impaired | Single family residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 131,253 | 133,212 |  |
Consumer | Purchased Credit Impaired | Home equity loan | Green Loans (HELOC) - first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer | Purchased Credit Impaired | Home equity loan | Green Loans (HELOC) - second liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer | Purchased Credit Impaired | Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer | Non-Traditional Mortgages (NTM) |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 818,010 | 885,148 |  |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 814,461 | 881,589 |  |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - second liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 3,549 | 3,559 |  |
Consumer | Non-Traditional Mortgages (NTM) | Single family residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 728,796 | 794,120 |  |
Consumer | Non-Traditional Mortgages (NTM) | Home equity loan | Green Loans (HELOC) - first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 85,665 | 87,469 |  |
Consumer | Non-Traditional Mortgages (NTM) | Home equity loan | Green Loans (HELOC) - second liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 3,549 | 3,559 |  |
Consumer | Non-Traditional Mortgages (NTM) | Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer | Traditional Loans | Single family residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,029,341 | 1,091,829 |  |
Consumer | Traditional Loans | Home equity loan | Green Loans (HELOC) - first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer | Traditional Loans | Home equity loan | Green Loans (HELOC) - second liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer | Traditional Loans | Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 122,265 | 107,063 |  |
Consumer | Total NTM and Traditional Loans | Single family residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,758,137 | 1,885,949 |  |
Consumer | Total NTM and Traditional Loans | Home equity loan | Green Loans (HELOC) - first liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 85,665 | 87,469 |  |
Consumer | Total NTM and Traditional Loans | Home equity loan | Green Loans (HELOC) - second liens |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 3,549 | 3,559 |  |
Consumer | Total NTM and Traditional Loans | Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | $ 122,265 | $ 107,063 |  |

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for 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 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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