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Deposits (Details) - USD ($) | Jun. 30, 2019 | Dec. 31, 2018
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Deposits Disclosure [Line Items] |  |
Time Deposits, $250,000 or More | $ 1,810,000,000 | $ 1,770,000,000
Securities pledged as collateral | 0 |
California State Treasurer |  |
Deposits Disclosure [Line Items] |  |
Time Deposits, $250,000 or More | 300,000,000.0 | 300,000,000
Securities pledged as collateral | 333,700,000 | 336,800,000
Brokered deposits | 1,480,000,000 | 1,570,000,000
Money market and NOW accounts | California State Treasurer |  |
Deposits Disclosure [Line Items] |  |
Brokered deposits | 266,900,000 | 370,400,000
Time deposits | California State Treasurer |  |
Deposits Disclosure [Line Items] |  |
Brokered deposits | $ 1,210,000,000 | $ 1,200,000,000

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- Definition Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
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- Definition Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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