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Composition of Loan and Lease Portfolio (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 41,844,019 | $ 40,133,861 |
Net deferred loan origination costs |  | 50,136 | 32,047 |
Allowance for losses |  | (147,638) | (159,820) | $ (158,046)
Total loans and leases, net |  | $ 41,746,517 | $ 40,006,088 |
Non-Covered Loans, Percentage |  | 100.00% | 100.00% |
Commercial and Industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans | [1] | $ 3,014,378 | $ 2,388,420 |
Non-Covered Loans, Percentage | [1] | 7.20% | 5.95% |
Commercial and Industrial | Other loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 1,742,380 | $ 1,705,308 |
Non-Covered Loans, Percentage |  | 4.16% | 4.25% |
Multi-Family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 31,158,672 | $ 29,883,919 |
Non-Covered Loans, Percentage |  | 74.46% | 74.46% |
Commercial Real Estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 7,081,910 | $ 6,998,834 |
Non-Covered Loans, Percentage |  | 16.93% | 17.44% |
One-to-four family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 380,361 | $ 446,094 |
Non-Covered Loans, Percentage |  | 0.91% | 1.11% |
Acquisition, development, and construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 200,596 | $ 407,870 |
Non-Covered Loans, Percentage |  | 0.48% | 1.02% |
Mortgage Receivable |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 38,821,539 | $ 37,736,717 |
Allowance for losses |  | $ (122,694) | $ (130,983) | $ (128,275)
Non-Covered Loans, Percentage |  | 92.78% | 94.03% |
Lease financing, unearned income |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 1,271,998 | $ 683,112 |
Non-Covered Loans, Percentage |  | 3.04% | 1.70% |
Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 8,102 | $ 8,724 |
Non-Covered Loans, Percentage |  | 0.02% | 0.02% |
Total Other Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 3,022,480 | $ 2,397,144 |
Total Other Loans | Other loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Non-Covered Loans |  | $ 3,022,480 | $ 2,397,144 |
Non-Covered Loans, Percentage |  | 7.22% | 5.97% |
[1] | Includes specialty finance loans and leases of $0.0 billion and $1.9 billion, respectively, at December 30, 2019 and 2018. Other C&I loans of $000.0 million and $469.9 million, respectively, at December 30, 2019 and 2018.

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