Subsequent Event	3 Months Ended
Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Event	Note 14 - Subsequent Event On April 17, 2017, Synovus Bank entered into a definitive agreement to acquire certain card assets and assume certain liabilities of World's Foremost Bank (WFB), a wholly-owned subsidiary of Cabela's Incorporated. Immediately following the closing of this transaction, Synovus will sell the credit card assets and related liabilities to Capital One Bank (USA), National Association, a subsidiary of Capital One Financial Corporation (Capital One), while retaining the brokered time deposits portfolio. The WFB brokered deposits portfolio has a carrying value of approximately $1.2 billion. Pursuant to the terms of the agreement, Synovus will receive $75 million in consideration from Cabela's and Capital One upon closing. The transaction is expected to close during the third quarter of 2017, subject to customary regulatory approvals and the satisfaction of other closing conditions, including the readiness of the Cabela's and Bass Pro Shops merger announced in October 2016 to be completed. The transaction will be accounted for as an assumption of liabilities pursuant to the asset acquisition model and the earning of fees for services performed. The $75 million in consideration will be recorded as a transaction fee, to be recognized upon closing of the transaction as no continuing involvement or contingencies with respect to the sale of the credit card assets and related liabilities will exist. If the transaction between Synovus and Capital One referred to above does not occur immediately after the transaction between Synovus and WFB, the transaction between Synovus and WFB will be rescinded, including repayment of any cash amounts paid and return of any assets and liabilities transferred, such that Cabela’s, WFB, Capital One and Synovus will be in the same position as if the transaction had never occurred. Additionally, the deposit liabilities acquired by Synovus will be recorded at fair value determined in accordance with the Brokered CD Curve Discount Methodology, as defined in the agreement. In the event that the book value of the deposits is less than the fair value of the deposits, Capital One will provide a cash payment to Synovus to compensate Synovus for the difference; however, Synovus is not required to make any payment if the fair value of the deposits is less than the book value. The deposits portfolio has a weighted average cost of funds of approximately 1.85%, maturities ranging from 2017 through 2023, and a weighted average maturity of approximately 2.75 years. For additional information regarding this transaction, please refer to Synovus' Current Report on Form 8-K filed with the SEC on April 17, 2017.

Note 14 - Subsequent Event

On April 17, 2017, Synovus Bank entered into a definitive agreement to acquire certain card assets and assume certain liabilities of World's Foremost Bank (WFB), a wholly-owned subsidiary of Cabela's Incorporated. Immediately following the closing of this transaction, Synovus will sell the credit card assets and related liabilities to Capital One Bank (USA), National Association, a subsidiary of Capital One Financial Corporation (Capital One), while retaining the brokered time deposits portfolio. The WFB brokered deposits portfolio has a carrying value of approximately $1.2 billion. Pursuant to the terms of the agreement, Synovus will receive $75 million in consideration from Cabela's and Capital One upon closing. The transaction is expected to close during the third quarter of 2017, subject to customary regulatory approvals and the satisfaction of other closing conditions, including the readiness of the Cabela's and Bass Pro Shops merger announced in October 2016 to be completed.

The transaction will be accounted for as an assumption of liabilities pursuant to the asset acquisition model and the earning of fees for services performed. The $75 million in consideration will be recorded as a transaction fee, to be recognized upon closing of the transaction as no continuing involvement or contingencies with respect to the sale of the credit card assets and related liabilities will exist. If the transaction between Synovus and Capital One referred to above does not occur immediately after the transaction between Synovus and WFB, the transaction between Synovus and WFB will be rescinded, including repayment of any cash amounts paid and return of any assets and liabilities transferred, such that Cabela’s, WFB, Capital One and Synovus will be in the same position as if the transaction had never occurred.

Additionally, the deposit liabilities acquired by Synovus will be recorded at fair value determined in accordance with the Brokered CD Curve Discount Methodology, as defined in the agreement. In the event that the book value of the deposits is less than the fair value of the deposits, Capital One will provide a cash payment to Synovus to compensate Synovus for the difference; however, Synovus is not required to make any payment if the fair value of the deposits is less than the book value. The deposits portfolio has a weighted average cost of funds of approximately 1.85%, maturities ranging from 2017 through 2023, and a weighted average maturity of approximately 2.75 years.

For additional information regarding this transaction, please refer to Synovus' Current Report on Form 8-K filed with the SEC on April 17, 2017.