Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2025 shares
Trading Arrangements, by Individual
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
John Ciulla [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	John Ciulla, our Chairman and Chief Executive Officer, entered into a Rule 10b5-1 trading agreement with a brokerage firm, intended to satisfy the affirmative defense of Rule 10b5-1(c), on April 30, 2025 for trades over a period of time from August 1, 2025 until August 3, 2026, or such earlier time as when 32,000 shares of Webster common stock are sold.
Name	John Ciulla
Title	Chairman and Chief Executive Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	April 30, 2025
Expiration Date	August 3, 2026
Arrangement Duration	367 days
Aggregate Available	32,000