Insider Trading Arrangements	3 Months Ended	6 Months Ended
	Jun. 30, 2023 shares	Jun. 30, 2023 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
Marty Schmitz [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		On May 26, 2023 (the "Adoption Date"), Marty Schmitz, a Director of HTLF, entered into a written plan for the sale of securities of HTLF intended to satisfy SEC Rule 10b5-1(c) (a "10b5-1 Plan"). Mr. Schmitz’s 10b5-1 Plan provides for the sale of up to 17,800 shares of HTLF’s common stock commencing no earlier than 90 days after the Adoption Date, and terminating on June 15, 2024.
Name	Marty Schmitz
Title	Director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	May 26, 2023
Arrangement Duration	386 days
Aggregate Available	17,800	17,800