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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Aging of Recorded Investment in Past Due Loans and Leases (Detail) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | $ 31,436 | $ 62,013 |
Current | 6,195,461 | 5,972,739 |
Total ending loan balances | 6,226,897 | 6,034,752 | $ 6,568,791
30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 13,254 | 38,180 |
60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 7,032 | 7,038 |
Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 11,150 | 16,795 |
Purchased Credit Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 17,655 |
Current | 0 | 124,171 |
Total ending loan balances | 0 | 141,826 | 642,367
Purchased Credit Impaired | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 10,783 |
Purchased Credit Impaired | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 4,295 |
Purchased Credit Impaired | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 2,577 |
Non-Traditional Mortgages (NTM) |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 793,946 | 885,148 |
Traditional Loans |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 25,800 | 39,698 |
Current | 5,407,151 | 4,968,080 |
Total ending loan balances | 5,432,951 | 5,007,778 |
Traditional Loans | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 10,790 | 23,204 |
Traditional Loans | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 5,031 | 2,743 |
Traditional Loans | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 9,979 | 13,751 |
Traditional Loans | Construction |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 176,397 | 125,100 |
Consumer | Single family residential mortgage |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 1,838,021 | 2,019,161 |
Consumer | Other consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 114,122 | 107,063 |
Consumer | Purchased Credit Impaired | Single family residential mortgage |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 16,639 |
Current | 0 | 116,573 |
Total ending loan balances | 0 | 133,212 |
Consumer | Purchased Credit Impaired | Single family residential mortgage | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 10,483 |
Consumer | Purchased Credit Impaired | Single family residential mortgage | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 4,063 |
Consumer | Purchased Credit Impaired | Single family residential mortgage | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 2,093 |
Consumer | Purchased Credit Impaired | Other consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 |
Consumer | Non-Traditional Mortgages (NTM) |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 5,636 | 4,660 |
Current | 788,310 | 880,488 |
Total ending loan balances | 793,946 | 885,148 |
Consumer | Non-Traditional Mortgages (NTM) | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,464 | 4,193 |
Consumer | Non-Traditional Mortgages (NTM) | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,001 | 0 |
Consumer | Non-Traditional Mortgages (NTM) | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,171 | 467 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 790,388 | 881,589 |
Consumer | Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - second liens |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 3,558 | 3,559 |
Consumer | Non-Traditional Mortgages (NTM) | Single family residential mortgage |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,976 | 4,660 |
Current | 706,123 | 789,460 |
Total ending loan balances | 708,099 | 794,120 |
Consumer | Non-Traditional Mortgages (NTM) | Single family residential mortgage | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 4,193 |
Consumer | Non-Traditional Mortgages (NTM) | Single family residential mortgage | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 805 | 0 |
Consumer | Non-Traditional Mortgages (NTM) | Single family residential mortgage | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,171 | 467 |
Consumer | Non-Traditional Mortgages (NTM) | Consumer home equity loan | Green Loans (HELOC) - first liens |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,962 | 0 |
Current | 79,327 | 87,469 |
Total ending loan balances | 82,289 | 87,469 |
Consumer | Non-Traditional Mortgages (NTM) | Consumer home equity loan | Green Loans (HELOC) - first liens | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,464 | 0 |
Consumer | Non-Traditional Mortgages (NTM) | Consumer home equity loan | Green Loans (HELOC) - first liens | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 498 | 0 |
Consumer | Non-Traditional Mortgages (NTM) | Consumer home equity loan | Green Loans (HELOC) - first liens | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Consumer | Non-Traditional Mortgages (NTM) | Consumer home equity loan | Green Loans (HELOC) - second liens |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 698 | 0 |
Current | 2,860 | 3,559 |
Total ending loan balances | 3,558 | 3,559 |
Consumer | Non-Traditional Mortgages (NTM) | Consumer home equity loan | Green Loans (HELOC) - second liens | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Consumer | Non-Traditional Mortgages (NTM) | Consumer home equity loan | Green Loans (HELOC) - second liens | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 698 | 0 |
Consumer | Non-Traditional Mortgages (NTM) | Consumer home equity loan | Green Loans (HELOC) - second liens | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Consumer | Non-Traditional Mortgages (NTM) | Other consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 |
Consumer | Traditional Loans | Single family residential mortgage |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 10,781 | 21,963 |
Current | 1,119,141 | 1,069,866 |
Total ending loan balances | 1,129,922 | 1,091,829 |
Consumer | Traditional Loans | Single family residential mortgage | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,949 | 11,225 |
Consumer | Traditional Loans | Single family residential mortgage | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 742 | 1,345 |
Consumer | Traditional Loans | Single family residential mortgage | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 8,090 | 9,393 |
Consumer | Traditional Loans | Other consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 6,678 | 11,338 |
Current | 107,444 | 95,725 |
Total ending loan balances | 114,122 | 107,063 |
Consumer | Traditional Loans | Other consumer | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 6,277 | 10,023 |
Consumer | Traditional Loans | Other consumer | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 282 | 933 |
Consumer | Traditional Loans | Other consumer | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 119 | 382 |
Commercial | Commercial and industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 1,602,805 | 1,522,960 | 1,531,041
Commercial | Commercial real estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 713,120 | 729,959 | 721,838
Commercial | Multifamily |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 1,617,890 | 1,365,262 | 1,199,207
Commercial | SBA |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 78,604 | 73,840 | 67,737
Commercial | Construction |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 176,397 | 125,100 | 99,086
Commercial | Lease financing |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 91 | 379 | 234,540
Commercial | Purchased Credit Impaired | Commercial and industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 156 |
Current | 0 | 4,604 |
Total ending loan balances | 0 | 4,760 | 4,796
Commercial | Purchased Credit Impaired | Commercial and industrial | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Purchased Credit Impaired | Commercial and industrial | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Purchased Credit Impaired | Commercial and industrial | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 156 |
Commercial | Purchased Credit Impaired | Commercial real estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Current | 0 | 1,182 |
Total ending loan balances | 0 | 1,182 | 2,418
Commercial | Purchased Credit Impaired | Commercial real estate | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Purchased Credit Impaired | Commercial real estate | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Purchased Credit Impaired | Commercial real estate | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Purchased Credit Impaired | Multifamily |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 | 0
Commercial | Purchased Credit Impaired | SBA |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 860 |
Current | 0 | 1,812 |
Total ending loan balances | 0 | 2,672 | 2,760
Commercial | Purchased Credit Impaired | SBA | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 300 |
Commercial | Purchased Credit Impaired | SBA | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 232 |
Commercial | Purchased Credit Impaired | SBA | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 328 |
Commercial | Purchased Credit Impaired | Construction |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 | 0
Commercial | Purchased Credit Impaired | Lease financing |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 | $ 0
Commercial | Non-Traditional Mortgages (NTM) | Commercial and industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 |
Commercial | Non-Traditional Mortgages (NTM) | Commercial real estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 |
Commercial | Non-Traditional Mortgages (NTM) | Multifamily |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 |
Commercial | Non-Traditional Mortgages (NTM) | SBA |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 |
Commercial | Non-Traditional Mortgages (NTM) | Construction |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 |
Commercial | Non-Traditional Mortgages (NTM) | Lease financing |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total ending loan balances | 0 | 0 |
Commercial | Traditional Loans | Commercial and industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 5,467 | 4,260 |
Current | 1,597,338 | 1,513,940 |
Total ending loan balances | 1,602,805 | 1,518,200 |
Commercial | Traditional Loans | Commercial and industrial | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,374 | 412 |
Commercial | Traditional Loans | Commercial and industrial | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 3,659 | 463 |
Commercial | Traditional Loans | Commercial and industrial | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 434 | 3,385 |
Commercial | Traditional Loans | Commercial real estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Current | 713,120 | 728,777 |
Total ending loan balances | 713,120 | 728,777 |
Commercial | Traditional Loans | Commercial real estate | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Commercial real estate | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Commercial real estate | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Multifamily |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Current | 1,617,890 | 1,365,262 |
Total ending loan balances | 1,617,890 | 1,365,262 |
Commercial | Traditional Loans | Multifamily | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Multifamily | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Multifamily | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | SBA |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 2,274 | 499 |
Current | 76,330 | 70,669 |
Total ending loan balances | 78,604 | 71,168 |
Commercial | Traditional Loans | SBA | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 631 | 15 |
Commercial | Traditional Loans | SBA | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 348 | 2 |
Commercial | Traditional Loans | SBA | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 1,295 | 482 |
Commercial | Traditional Loans | Construction |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 559 | 1,529 |
Current | 175,838 | 123,571 |
Total ending loan balances | 176,397 | 125,100 |
Commercial | Traditional Loans | Construction | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 559 | 1,529 |
Commercial | Traditional Loans | Construction | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Construction | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Lease financing |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 41 | 109 |
Current | 50 | 270 |
Total ending loan balances | 91 | 379 |
Commercial | Traditional Loans | Lease financing | 30 - 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Lease financing | 60 - 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | 0 | 0 |
Commercial | Traditional Loans | Lease financing | Greater than 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Past Due | $ 41 | $ 109 |

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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=82891408&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=84173941&loc=d3e5074-111524 + Details
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