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Equity Capital	9 Months Ended
Equity Capital	Sep. 30, 2018
Equity [Abstract]
Equity Capital	Equity Capital The Company is well capitalized and at September 30, 2018, the Company and the Company’s principal banking subsidiary, Seacoast Bank, exceeded the common equity Tier 1 capital ratio (CET1) regulatory threshold of 6.5% for well-capitalized institutions under the Basel III standardized transition approach, as well as risk-based and leverage ratio requirements for well capitalized banks under the regulatory framework for prompt corrective action.