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LOANS AND ALLOWANCE FOR LOAN LOSSES - Risk Categories for Loans and Leases (Detail) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | $ 6,383,259 | $ 7,700,873 | $ 7,253,293
Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 6,187,912 | 7,543,176 |
Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 108,266 | 76,945 |
Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 85,762 | 79,898 |
Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,319 | 854 |
NTM Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 6,383,259 | 7,700,873 |
Traditional Loans and Leases |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 5,729,784 | 6,874,142 |
Traditional Loans and Leases | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 5,551,654 | 6,729,707 |
Traditional Loans and Leases | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 103,093 | 65,979 |
Traditional Loans and Leases | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 73,718 | 77,602 |
Traditional Loans and Leases | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,319 | 854 |
Traditional Loans and Leases | Construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 228,561 | 203,976 |
Consumer | Single family residential mortgage |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,775,953 | 2,305,490 |
Consumer | Other consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 59,122 | 70,265 |
Consumer | NTM Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 653,475 | 826,731 |
Consumer | NTM Loans | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 636,258 | 813,469 |
Consumer | NTM Loans | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 5,173 | 10,966 |
Consumer | NTM Loans | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 12,044 | 2,296 |
Consumer | NTM Loans | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Consumer | NTM Loans | Single family residential mortgage |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 651,167 | 824,318 |
Consumer | NTM Loans | Single family residential mortgage | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 633,950 | 811,056 |
Consumer | NTM Loans | Single family residential mortgage | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 5,173 | 10,966 |
Consumer | NTM Loans | Single family residential mortgage | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 12,044 | 2,296 |
Consumer | NTM Loans | Single family residential mortgage | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Consumer | NTM Loans | Other consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 2,308 | 2,413 |
Consumer | NTM Loans | Other consumer | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 2,308 | 2,413 |
Consumer | NTM Loans | Other consumer | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Consumer | NTM Loans | Other consumer | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Consumer | NTM Loans | Other consumer | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Consumer | Traditional Loans and Leases | Single family residential mortgage |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,124,786 | 1,481,172 |
Consumer | Traditional Loans and Leases | Single family residential mortgage | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,100,990 | 1,461,721 |
Consumer | Traditional Loans and Leases | Single family residential mortgage | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 4,291 | 2,602 |
Consumer | Traditional Loans and Leases | Single family residential mortgage | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 18,988 | 16,849 |
Consumer | Traditional Loans and Leases | Single family residential mortgage | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 517 | 0 |
Consumer | Traditional Loans and Leases | Other consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 56,814 | 67,852 |
Consumer | Traditional Loans and Leases | Other consumer | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 55,947 | 66,228 |
Consumer | Traditional Loans and Leases | Other consumer | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 317 | 979 |
Consumer | Traditional Loans and Leases | Other consumer | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 550 | 645 |
Consumer | Traditional Loans and Leases | Other consumer | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Commercial | Commercial and industrial |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,789,478 | 1,944,142 | 1,673,055
Commercial | Commercial real estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 891,029 | 867,013 | 823,193
Commercial | Multifamily |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,563,757 | 2,241,246 | 2,112,190
Commercial | SBA |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 75,359 | 68,741 | 71,494
Commercial | Construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 228,561 | 203,976 | $ 200,294
Commercial | Traditional Loans and Leases | Commercial and industrial |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,789,478 | 1,944,142 |
Commercial | Traditional Loans and Leases | Commercial and industrial | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,673,655 | 1,859,569 |
Commercial | Traditional Loans and Leases | Commercial and industrial | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 77,431 | 41,302 |
Commercial | Traditional Loans and Leases | Commercial and industrial | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 38,392 | 43,271 |
Commercial | Traditional Loans and Leases | Commercial and industrial | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Commercial | Traditional Loans and Leases | Commercial real estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 891,029 | 867,013 |
Commercial | Traditional Loans and Leases | Commercial real estate | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 887,232 | 851,604 |
Commercial | Traditional Loans and Leases | Commercial real estate | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 2,520 | 11,376 |
Commercial | Traditional Loans and Leases | Commercial real estate | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,277 | 4,033 |
Commercial | Traditional Loans and Leases | Commercial real estate | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Commercial | Traditional Loans and Leases | Multifamily |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,563,757 | 2,241,246 |
Commercial | Traditional Loans and Leases | Multifamily | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 1,551,231 | 2,239,301 |
Commercial | Traditional Loans and Leases | Multifamily | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 8,428 | 0 |
Commercial | Traditional Loans and Leases | Multifamily | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 4,098 | 1,945 |
Commercial | Traditional Loans and Leases | Multifamily | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 0 | 0 |
Commercial | Traditional Loans and Leases | SBA |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 75,359 | 68,741 |
Commercial | Traditional Loans and Leases | SBA | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 63,543 | 53,433 |
Commercial | Traditional Loans and Leases | SBA | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 3,120 | 6,114 |
Commercial | Traditional Loans and Leases | SBA | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 7,894 | 8,340 |
Commercial | Traditional Loans and Leases | SBA | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 802 | 854 |
Commercial | Traditional Loans and Leases | Construction |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 228,561 | 203,976 |
Commercial | Traditional Loans and Leases | Construction | Pass |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 219,056 | 197,851 |
Commercial | Traditional Loans and Leases | Construction | Special Mention |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 6,986 | 3,606 |
Commercial | Traditional Loans and Leases | Construction | Substandard |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | 2,519 | 2,519 |
Commercial | Traditional Loans and Leases | Construction | Doubtful |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Total loans | $ 0 | $ 0 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 + Details
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