Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2018
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	Note 2 — Summary of Significant Accounting Policies The information contained in the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, as filed with the Securities and Exchange Commission (the “SEC”) on February 23, 2018, should be referenced when reading these unaudited condensed consolidated financial statements. Unless otherwise mentioned or unless the context requires otherwise, references herein to "South State," the "Company" "we," "us," "our" or similar references mean South State Corporation and its consolidated subsidiaries. References to the “Bank” means South State Corporation’s wholly owned subsidiary, South State Bank, a South Carolina banking corporation. Revenue from Contracts with Customers (Topic 606) and Method of Adoption On January 1, 2018, we adopted the requirements of Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (“ASU Topic 606”). The majority of our revenue is derived primarily from interest income from receivables (loans) and securities. Other revenues are derived from fees received in connection with deposit accounts, mortgage banking activities including gains from the sale of loans and loan origination fees, and trust and investment advisory services. The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company adopted ASU Topic 606 using the modified retrospective transition approach which does not require restatement of prior periods. The method was selected as there were no material changes in the timing of revenue recognition resulting in no comparability issues with prior periods. This adoption method is considered a change in accounting principle requiring additional disclosure of the nature of and reason for the change, which is solely a result of the adoption of the required standard. When applying the modified retrospective approach under ASU Topic 606, the Company has elected, as a practical expedient, to apply the revenue standard only to contracts that are not completed as of January 1, 2018. A completed contract is considered to be a contract for which all (or substantially all) of the revenue was recognized in accordance with revenue guidance that was in effect before January 1, 2018. There were no uncompleted contracts as of January 1, 2018 for which application of the new standard required an adjustment to retained earnings. The following disclosures related to ASU Topic 606 involve income derived from contracts with customers. Within the scope of ASU Topic 606, we maintain contracts to provide services, primarily for investment advisory and/or custody of assets. Through our wholly-owned subsidiaries, the Bank, South State Advisory and Minis, Inc., we contract with our customers to perform IRA, Trust, and/or Custody and Agency advisory services. Total revenue recognized from these contracts with customers was $7.5 million for the three months ended March 31, 2018. The Bank contracts with our customers to perform deposit account services. Total revenue recognized from these contracts with customers is $25.8 million for the three months ended March 31, 2018. Due to the nature of our relationship with the customers that we provide services, we do not incur costs to obtain contracts and there are no material incremental costs to fulfill these contracts that should be capitalized. Disaggregation of Revenue - Our portfolio of services provided to our customers consists of over 791,000 active contracts. We have disaggregated revenue according to timing of the transfer of service. Total revenue derived from contracts in which services are transferred at a point in time is $33.8 million for the three months ended March 31, 2018. Total revenue derived from contracts in which services are transferred over time is $4.8 million for the three months ended March 31, 2018. Revenue is recognized as the services are provided to the customers. Economic factors impacting the customers could affect the nature, amount, and timing of these cash flows, as unfavorable economic conditions could impair the customers’ ability to provide payment for services. This risk is mitigated as we generally deduct payments from customers’ accounts as services are rendered. Contract Balances - The timing of revenue recognition, billings, and cash collections results in billed accounts receivable on the balance sheet. Most contracts call for payment by a charge or deduction to the respective customer account but there are some that require a receipt of payment from the customer. For fee per transaction contracts, the customers are billed as the transactions are processed. For hourly rate and monthly service contracts related to trust and some investment revenues, the customers are billed monthly (generally as a percentage basis point of the market value of the investment account). In some cases, specific to Minis, Inc. and South State Advisory customers are billed in advance for quarterly services to be performed based on the past quarters average account balance. These do create contract liabilities or deferred revenue, as the customers pay in advance for service. Neither the contract liabilities nor the accounts receivables balances are material to the Company’s balance sheet. Performance Obligations - A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account in ASU Topic 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. The performance obligations for these contracts are satisfied as the service is provided to the customer (either over time or at a point in time). The payment terms of the contracts are typically based on a basis point percentage of the investment account market value, fee per hour of service, or fee for service incurred. There are no significant financing components in the contracts. Excluding deposit services revenues which are mostly billed at a point in time as a fee for services incurred, all other contracts within the scope of ASU Topic 606 contain variable consideration in that fees earned are derived from market values of accounts or from hours worked for services performed which determines the amount of consideration to which we are entitled. The variability is resolved when the hours are incurred or services are provided. The contracts do not include obligations for returns, refunds, or warranties. The contracts are specific to the amounts owed to the Company for services performed during a period should the contracts be terminated. Significant Judgements - All of the contracts create performance obligations that are satisfied at a point in time excluding the contracts billed in advance through Minis and South State Advisory and some immaterial deposit revenues. Revenue is recognized as services are billed to the customers. Variable consideration does exist for contracts related to our trust and investment services as revenues are based on market values and services performed. We have adopted the right-to-invoice practical expedient for trust management contracts through South State Bank which we contract with our customers to perform IRA, Trust, and/or Custody services.

Note 2 — Summary of Significant Accounting Policies

The information contained in the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, as filed with the Securities and Exchange Commission (the “SEC”) on February 23, 2018, should be referenced when reading these unaudited condensed consolidated financial statements. Unless otherwise mentioned or unless the context requires otherwise, references herein to "South State," the "Company" "we," "us," "our" or similar references mean South State Corporation and its consolidated subsidiaries. References to the “Bank” means South State Corporation’s wholly owned subsidiary, South State Bank, a South Carolina banking corporation.

Revenue from Contracts with Customers (Topic 606) and Method of Adoption

On January 1, 2018, we adopted the requirements of Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (“ASU Topic 606”). The majority of our revenue is derived primarily from interest income from receivables (loans) and securities. Other revenues are derived from fees received in connection with deposit accounts, mortgage banking activities including gains from the sale of loans and loan origination fees, and trust and investment advisory services. The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.

The Company adopted ASU Topic 606 using the modified retrospective transition approach which does not require restatement of prior periods. The method was selected as there were no material changes in the timing of revenue recognition resulting in no comparability issues with prior periods. This adoption method is considered a change in accounting principle requiring additional disclosure of the nature of and reason for the change, which is solely a result of the adoption of the required standard. When applying the modified retrospective approach under ASU Topic 606, the Company has elected, as a practical expedient, to apply the revenue standard only to contracts that are not completed as of January 1, 2018. A completed contract is considered to be a contract for which all (or substantially all) of the revenue was recognized in accordance with revenue guidance that was in effect before January 1, 2018. There were no uncompleted contracts as of January 1, 2018 for which application of the new standard required an adjustment to retained earnings.

The following disclosures related to ASU Topic 606 involve income derived from contracts with customers. Within the scope of ASU Topic 606, we maintain contracts to provide services, primarily for investment advisory and/or custody of assets. Through our wholly-owned subsidiaries, the Bank, South State Advisory and Minis, Inc., we contract with our customers to perform IRA, Trust, and/or Custody and Agency advisory services. Total revenue recognized from these contracts with customers was $7.5 million for the three months ended March 31, 2018. The Bank contracts with our customers to perform deposit account services. Total revenue recognized from these contracts with customers is $25.8 million for the three months ended March 31, 2018. Due to the nature of our relationship with the customers that we provide services, we do not incur costs to obtain contracts and there are no material incremental costs to fulfill these contracts that should be capitalized.

Disaggregation of Revenue - Our portfolio of services provided to our customers consists of over 791,000 active contracts. We have disaggregated revenue according to timing of the transfer of service. Total revenue derived from contracts in which services are transferred at a point in time is $33.8 million for the three months ended March 31, 2018. Total revenue derived from contracts in which services are transferred over time is $4.8 million for the three months ended March 31, 2018. Revenue is recognized as the services are provided to the customers. Economic factors impacting the customers could affect the nature, amount, and timing of these cash flows, as unfavorable economic conditions could impair the customers’ ability to provide payment for services. This risk is mitigated as we generally deduct payments from customers’ accounts as services are rendered.

Contract Balances - The timing of revenue recognition, billings, and cash collections results in billed accounts receivable on the balance sheet. Most contracts call for payment by a charge or deduction to the respective customer account but there are some that require a receipt of payment from the customer. For fee per transaction contracts, the customers are billed as the transactions are processed. For hourly rate and monthly service contracts related to trust and some investment revenues, the customers are billed monthly (generally as a percentage basis point of the market value of the investment account). In some cases, specific to Minis, Inc. and South State Advisory customers are billed in advance for quarterly services to be performed based on the past quarters average account balance. These do create contract liabilities or deferred revenue, as the customers pay in advance for service. Neither the contract liabilities nor the accounts receivables balances are material to the Company’s balance sheet.

Performance Obligations - A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account in ASU Topic 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. The performance obligations for these contracts are satisfied as the service is provided to the customer (either over time or at a point in time). The payment terms of the contracts are typically based on a basis point percentage of the investment account market value, fee per hour of service, or fee for service incurred. There are no significant financing components in the contracts. Excluding deposit services revenues which are mostly billed at a point in time as a fee for services incurred, all other contracts within the scope of ASU Topic 606 contain variable consideration in that fees earned are derived from market values of accounts or from hours worked for services performed which determines the amount of consideration to which we are entitled. The variability is resolved when the hours are incurred or services are provided. The contracts do not include obligations for returns, refunds, or warranties. The contracts are specific to the amounts owed to the Company for services performed during a period should the contracts be terminated.

Significant Judgements - All of the contracts create performance obligations that are satisfied at a point in time excluding the contracts billed in advance through Minis and South State Advisory and some immaterial deposit revenues. Revenue is recognized as services are billed to the customers. Variable consideration does exist for contracts related to our trust and investment services as revenues are based on market values and services performed. We have adopted the right-to-invoice practical expedient for trust management contracts through South State Bank which we contract with our customers to perform IRA, Trust, and/or Custody services.