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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill and Other Intangible Assets (Details) - Silvergate Bank Branch, San Diego County $ in Millions	Mar. 25, 2019 USD ($)
Business Acquisition [Line Items]
Goodwill acquired	$ 5.9
Core deposit intangibles acquired	$ 1.9

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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