Senior Notes	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Senior Notes	Senior NotesOn June 23, 2020, the Company completed a $60.0 million offering of senior notes with a coupon rate of 5.75% and a maturity date of June 30, 2025 (the “Senior Notes”). The net proceeds, after direct issuance costs of $1.6 million, totaled $58.4 million. As of December 31, 2021, these Senior Notes amounted to $58.9 million, net of direct unamortized issuance costs of $1.1 million. The Senior Notes are presented net of direct issuance costs in the consolidated financial statements. These costs have been deferred and are being amortized over the term of the Senior Notes of 5 years as an adjustment to yield. These Senior Notes are unsecured and unsubordinated, rank equally with all of our existing and future unsecured and unsubordinated indebtedness, and are fully and unconditionally guaranteed by our wholly-owned intermediate holding company subsidiary Amerant Florida Bancorp (“Amerant Florida”).