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Loans and Leases Receivable and Allowance for Loan and Lease Losses - Credit Quality Tables for Loans Receivable Portfolio (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | $ 7,316,903 | $ 7,138,498
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 5,442,307 | 6,181,911
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 111,157 | 126,180
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 139,744 | 110,080
Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,597,188 | 700,664
Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 26,507 | 19,663
Multi-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,909,274 | 3,285,297
Multi-family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,816,200 | 3,201,822
Multi-family | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 69,637 | 55,696
Multi-family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 23,437 | 27,779
Multi-family | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Multi-family | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,889,980 | 1,373,800
Commercial and industrial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,841,074 | 1,306,466
Commercial and industrial | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 26,285 | 30,551
Commercial and industrial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 22,621 | 36,783
Commercial and industrial | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Commercial and industrial | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Commercial real estate owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 552,007 | 577,477
Commercial real estate owner occupied | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 536,777 | 562,639
Commercial real estate owner occupied | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 8,286 | 9,730
Commercial real estate owner occupied | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 6,944 | 5,108
Commercial real estate owner occupied | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Commercial real estate owner occupied | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Commercial real estate non-owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,223,529 | 1,125,106
Commercial real estate non-owner occupied | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,129,838 | 1,054,493
Commercial real estate non-owner occupied | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 6,949 | 30,203
Commercial real estate non-owner occupied | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 86,742 | 40,410
Commercial real estate non-owner occupied | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Commercial real estate non-owner occupied | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 118,418 | 56,491
Construction | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 118,418 | 56,491
Construction | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Construction | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Construction | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 375,014 | 566,561
Residential real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Residential real estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Residential real estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Residential real estate | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 362,962 | 555,016
Residential real estate | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 12,052 | 11,545
Manufactured housing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 70,398 | 79,731
Manufactured housing | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Manufactured housing | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Manufactured housing | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Manufactured housing | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 63,250 | 71,924
Manufactured housing | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 7,148 | 7,807
Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,178,283 | 74,035
Other consumer | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Other consumer | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Other consumer | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 0 | 0
Other consumer | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | 1,170,976 | 73,724
Other consumer | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | $ 7,307 | $ 311

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