Consolidated Statements of Operations and Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest income
Loans	$ 61,514	$ 53,612	$ 117,852	$ 106,383
Investment securities	9,135	7,499	17,763	15,006
Interest earning deposits with banks	518	62	650	113
Total interest income	71,167	61,173	136,265	121,502
Interest expense
Interest bearing demand deposits	1,034	123	1,324	236
Savings and money market deposits	1,365	945	2,110	1,925
Time deposits	4,503	6,327	8,784	13,687
Advances from the Federal Home Loan Bank	3,341	2,255	5,822	5,013
Senior notes	942	942	1,884	1,884
Subordinated notes	361	0	449	0
Junior subordinated debentures	676	609	1,302	1,216
Securities sold under agreements to repurchase	0	1	0	1
Total interest expense	12,222	11,202	21,675	23,962
Net interest income	58,945	49,971	114,590	97,540
Provision for (reversal of) loan losses	0	(5,000)	(10,000)	(5,000)
Net interest income after provision for (reversal of) loan losses	58,945	54,971	124,590	102,540
Noninterest income
Deposits and service fees	4,577	4,284	9,197	8,390
Brokerage, advisory and fiduciary activities	4,439	4,431	9,035	9,034
Loan-level derivative income	1,009	1,293	4,161	1,525
Change in cash surrender value of bank owned life insurance	1,334	1,368	2,676	2,724
Securities (losses) gains, net	(2,602)	1,329	(1,833)	3,911
Cards and trade finance servicing fees	508	388	1,098	727
Gain (loss) on early extinguishment of advances from the Federal Home Loan Bank, net	2	(2,488)	(712)	(2,488)
Derivative gains (losses), net	855	0	(490)	0
Other noninterest income	2,809	5,129	3,824	6,074
Total noninterest income	12,931	15,734	26,956	29,897
Noninterest expense
Salaries and employee benefits	30,212	30,796	60,615	57,223
Occupancy and equipment	7,760	5,342	14,485	9,830
Telecommunication and data processing	3,214	3,515	7,252	7,242
Professional and other services fees	6,746	4,693	13,928	8,477
Advertising expenses	3,253	827	6,225	1,143
Other real estate owned valuation expense	3,174	0	3,174	0
Depreciation and amortization	1,294	1,872	2,446	3,658
FDIC assessments and insurance	1,526	1,702	2,922	3,457
Loans held for sale valuation (reversal) expense	(300)	0	159	0
Contract termination costs	2,802	0	6,814	0
Other operating expenses	2,560	2,378	5,039	3,720
Total noninterest expenses	62,241	51,125	123,059	94,750
Income before income tax expense	9,635	19,580	28,487	37,687
Income tax expense	(2,033)	(4,435)	(6,011)	(8,083)
Net income before attribution of noncontrolling interest	7,602	15,145	22,476	29,604
Noncontrolling interest	(72)	(817)	(1,148)	(817)
Net income attributable to Amerant Bancorp Inc.	7,674	15,962	23,624	30,421
Other comprehensive loss, net of tax
Net unrealized holding (losses) gains on debt securities available for sale arising during the period	(26,442)	4,937	(66,079)	(4,529)
Net unrealized holding gains (losses) on cash flow hedges arising during the period	54	(29)	178	7
Reclassification adjustment for items included in net income	(147)	(1,059)	(275)	(3,384)
Other comprehensive (loss) income	(26,535)	3,849	(66,176)	(7,906)
Comprehensive (loss) income	$ (18,861)	$ 19,811	$ (42,552)	$ 22,515
Earnings Per Share (Note 19):
Basic earnings per common share (in dollars per share)	$ 0.23	$ 0.43	$ 0.69	$ 0.81
Diluted earnings per common share (in dollars per share)	$ 0.23	$ 0.42	$ 0.68	$ 0.81