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Acquisition - Additional Information (Detail) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 27, 2016 | Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 11,031 | $ 11,031
Banc of California Leases Acquisition |  |  |
Business Acquisition [Line Items] |  |  |
Cash consideration paid | $ 240,800 |  |
Other tangible and intangible assets acquired | 12,600 |  |
Goodwill | 11,000 |  |
Lease Intangible Asset | Banc of California Leases Acquisition |  |  |
Business Acquisition [Line Items] |  |  |
Estimated fair value of acquired intangibles | 228,200 |  |
Third-party originators intangible |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset amortization period |  | 7 years |
Third-party originators intangible | Banc of California Leases Acquisition |  |  |
Business Acquisition [Line Items] |  |  |
Estimated fair value of acquired intangibles | $ 483 |  |
Intangible asset amortization period | 7 years |  |

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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Tangible and Intangible Assets + References No definition available. + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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