Represents the value of stock options of the acquired entity converted as a part of consideration for acquisition.

No definition available.

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- Definition

Represents the fixed exchange ratio per share of acquirer's shares to be received in exchange for shares of acquiree entity.

+ References

No definition available.

+ Details

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- Definition

Amount of consideration decreased during the period.

+ References

No definition available.

+ Details

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- Definition

The amount of credit deficiencies that were identified as Purchased Credit Deteriorated ("PCD") loans recognized as of the acquisition date.

+ References

No definition available.

+ Details

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- Definition

The percentage of loans acquired as a percentage of total loans.

+ References

No definition available.

+ Details

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Namespace Prefix:	ssb_
Data Type:	num:percentItemType
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- Definition

The amount of estimated discount on loans as of the acquisition date.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

The percentage of estimated discount on loans as of the acquisition date.

+ References

No definition available.

+ Details

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- Definition

The amount of fair value adjustment on loans acquired.

+ References

No definition available.

+ Details

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Namespace Prefix:	ssb_
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Balance Type:	credit
Period Type:	duration

- Definition

The amount of loans receivable recognized as of the acquisition date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ssb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of loans receivable recognized as of the acquisition date after initial adjustment.

+ References

No definition available.

+ Details

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of the conversion of outstanding stock options and restricted stock.

+ References

No definition available.

+ Details

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-SubTopic 30
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-Paragraph 1
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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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- Definition

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

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- Definition

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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Mergers and Acquisitions - CSFL Narrative (Details) $ in Thousands		3 Months Ended		12 Months Ended
	Jun. 07, 2020 USD ($) shares	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Mergers and Acquisitions
Goodwill		$ 1,563,942		$ 1,563,942	$ 1,002,900	$ 1,002,900
CSFL
Mergers and Acquisitions
Shares of the common stock in exchange for each share	0.3001
Number of shares issued as consideration \| shares	37,271,069
Purchase price	$ 2,256,708		$ 2,260,000
Value of the conversion of outstanding stock options and restricted stock	15,500
Purchased price decreased		$ 5,200
Stock option conversion	2,900
Loans at fair value acquired	12,950,583
Loans at fair value acquired after initial fair value adjustment	13,000,000
Estimated discount on loans	$ 239,500
Estimated discount on loans (as a percent)	1.82%
Fair value adjustment on loans acquired	$ 29,800
Loans acquired as a percentage of total loans	113.90%
Credit deficiencies that were identified as Purchased Credit Deteriorated ("PCD") loans.	$ 3,100,000
Estimated fair value of intangible asset	140,862
Goodwill	561,042
Acquisition costs				$ 83,000	$ 0
CSFL \| Core Deposits
Mergers and Acquisitions
Estimated fair value of intangible asset	$ 125,900
Estimated economic life of intangible asset	10 years
Subsequent Fair Value Adjustments \| CSFL
Mergers and Acquisitions
Loans at fair value acquired	$ 29,834
Estimated fair value of intangible asset	10,000
Goodwill	$ (39,441)