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Deposits (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	$ 1,560.0	$ 1,550.0
California State Treasurer
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	300.0
Available-for-sale Securities Pledged as Collateral	355.7	371.6
Interest-bearing Domestic Deposit, Brokered	$ 714.4	$ 724.7

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[Line Items] for Deposits Disclosure [Table]

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Time Deposits, $250,000 or More

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- Definition

The fair value of available-for-sale securities that serve as collateral for borrowings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5086-111524

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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://www.xbrl.org/2003/role/presentationRef
-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

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