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Loans and Leases Receivable and Allowance for Credit Losses - Schedule of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | $ 56,379 |  |  |  | $ 39,972 | $ 56,379 | $ 39,972 |
Charge-offs |  |  |  |  |  |  |  |  | (61,736) | (9,590) |
Recoveries |  |  |  |  |  |  |  |  | 6,930 | 1,770 |
Provision for credit losses on loans and leases | $ (2,913) | $ 12,955 | $ 20,946 | 31,786 | $ 9,689 | $ 4,426 | $ 5,346 | 4,767 | 62,774 | 24,227 | $ 5,642
Ending balance | 144,176 |  |  |  | 56,379 |  |  |  | 144,176 | 56,379 | 39,972
Multi-family |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 6,157 |  |  |  | 11,462 | 6,157 | 11,462 |
Charge-offs |  |  |  |  |  |  |  |  | 0 | (541) |
Recoveries |  |  |  |  |  |  |  |  | 0 | 7 |
Provision for credit losses on loans and leases |  |  |  |  |  |  |  |  | 4,292 | (4,771) |
Ending balance | 12,620 |  |  |  | 6,157 |  |  |  | 12,620 | 6,157 | 11,462
Commercial and industrial |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 15,556 |  |  |  | 12,145 | 15,556 | 12,145 |
Charge-offs |  |  |  |  |  |  |  |  | (3,158) | (532) |
Recoveries |  |  |  |  |  |  |  |  | 3,019 | 1,050 |
Provision for credit losses on loans and leases |  |  |  |  |  |  |  |  | (3,937) | 2,893 |
Ending balance | 12,239 |  |  |  | 15,556 |  |  |  | 12,239 | 15,556 | 12,145
Commercial real estate owner occupied |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 2,235 |  |  |  | 3,320 | 2,235 | 3,320 |
Charge-offs |  |  |  |  |  |  |  |  | (78) | (119) |
Recoveries |  |  |  |  |  |  |  |  | 28 | 236 |
Provision for credit losses on loans and leases |  |  |  |  |  |  |  |  | 1,554 | (1,202) |
Ending balance | 9,512 |  |  |  | 2,235 |  |  |  | 9,512 | 2,235 | 3,320
Commercial real estate non-owner occupied |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 6,243 |  |  |  | 6,093 | 6,243 | 6,093 |
Charge-offs |  |  |  |  |  |  |  |  | (25,779) | 0 |
Recoveries |  |  |  |  |  |  |  |  | 1,293 | 0 |
Provision for credit losses on loans and leases |  |  |  |  |  |  |  |  | 29,777 | 150 |
Ending balance | 19,452 |  |  |  | 6,243 |  |  |  | 19,452 | 6,243 | 6,093
Construction |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 1,262 |  |  |  | 624 | 1,262 | 624 |
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |
Recoveries |  |  |  |  |  |  |  |  | 128 | 136 |
Provision for credit losses on loans and leases |  |  |  |  |  |  |  |  | 4,579 | 502 |
Ending balance | 5,871 |  |  |  | 1,262 |  |  |  | 5,871 | 1,262 | 624
Residential real estate |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 3,218 |  |  |  | 3,654 | 3,218 | 3,654 |
Charge-offs |  |  |  |  |  |  |  |  | (60) | (297) |
Recoveries |  |  |  |  |  |  |  |  | 86 | 27 |
Provision for credit losses on loans and leases |  |  |  |  |  |  |  |  | (785) | (166) |
Ending balance | 3,977 |  |  |  | 3,218 |  |  |  | 3,977 | 3,218 | 3,654
Manufactured housing |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 1,060 |  |  |  | 145 | 1,060 | 145 |
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 |
Provision for credit losses on loans and leases |  |  |  |  |  |  |  |  | 328 | 915 |
Ending balance | 5,190 |  |  |  | 1,060 |  |  |  | 5,190 | 1,060 | 145
Installment |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 20,648 |  |  |  | $ 2,529 | 20,648 | 2,529 |
Charge-offs |  |  |  |  |  |  |  |  | (32,661) | (8,101) |
Recoveries |  |  |  |  |  |  |  |  | 2,376 | 314 |
Provision for credit losses on loans and leases |  |  |  |  |  |  |  |  | 26,966 | 25,906 |
Ending balance | $ 75,315 |  |  |  | 20,648 |  |  |  | 75,315 | 20,648 | $ 2,529
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 79,829 |  |  |  |  | 79,829 |  |
Ending balance |  |  |  |  | 79,829 |  |  |  |  | 79,829 |
Cumulative Effect, Period of Adoption, Adjustment | Multi-family |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 2,171 |  |  |  |  | 2,171 |  |
Ending balance |  |  |  |  | 2,171 |  |  |  |  | 2,171 |
Cumulative Effect, Period of Adoption, Adjustment | Commercial and industrial |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 759 |  |  |  |  | 759 |  |
Ending balance |  |  |  |  | 759 |  |  |  |  | 759 |
Cumulative Effect, Period of Adoption, Adjustment | Commercial real estate owner occupied |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 5,773 |  |  |  |  | 5,773 |  |
Ending balance |  |  |  |  | 5,773 |  |  |  |  | 5,773 |
Cumulative Effect, Period of Adoption, Adjustment | Commercial real estate non-owner occupied |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 7,918 |  |  |  |  | 7,918 |  |
Ending balance |  |  |  |  | 7,918 |  |  |  |  | 7,918 |
Cumulative Effect, Period of Adoption, Adjustment | Construction |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | (98) |  |  |  |  | (98) |  |
Ending balance |  |  |  |  | (98) |  |  |  |  | (98) |
Cumulative Effect, Period of Adoption, Adjustment | Residential real estate |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 1,518 |  |  |  |  | 1,518 |  |
Ending balance |  |  |  |  | 1,518 |  |  |  |  | 1,518 |
Cumulative Effect, Period of Adoption, Adjustment | Manufactured housing |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 3,802 |  |  |  |  | 3,802 |  |
Ending balance |  |  |  |  | 3,802 |  |  |  |  | 3,802 |
Cumulative Effect, Period of Adoption, Adjustment | Installment |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | $ 57,986 |  |  |  |  | $ 57,986 |  |
Ending balance |  |  |  |  | $ 57,986 |  |  |  |  | $ 57,986 |

X
- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
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