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Related Party Transactions (Details) - South State Bank (the Bank) - Directors and executive officers, their immediate families and their business interests - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Related Party Transactions
Loans outstanding	$ 28.7	$ 37.5
Additional loans made	12.4
Repayments received	17.7
Related party deposits	18.8	$ 21.8
CSFL
Related Party Transactions
Additional loans made	31.8
Loans reduced	$ 35.3

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- Definition

Reflects the amount of reductions to advances made to related parties in the form of loan and lease receivables.

+ References

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For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

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Reflects the amount of new advances made to related parties in the form of loan and lease receivables.

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The cash inflow associated with collection, whether partial or full, of long-term loans to a related party. Alternate caption: Proceeds from Advances to Affiliates.

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Amount of deposits held by the entity for a related party (entity, shareholder, employee).

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