Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Mar. 31, 2022	Dec. 31, 2021	Oct. 08, 2021	Oct. 30, 2019
Liabilities Assumed
Goodwill		$ 1,147,007	$ 1,146,007
Landmark Community Bank
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash and due from banks	$ 27,591				$ 27,591
Due from banks - time	100				100
Investment securities	114,668				114,793
Loans acquired	789,504			$ 789,500	785,551
Allowance for credit losses on loans	(2,359)				(5,980)
Premises and equipment	5,441				9,540
Bank owned life insurance	21,287				21,287
Other assets	8,381				13,036
Total assets acquired	968,772			968,800	966,006
Liabilities Assumed
Non-interest bearing transaction accounts	110,393				110,393
Interest bearing transaction accounts and savings deposits	425,777				425,777
Time deposits	266,501				266,835
Total deposits	802,671			802,700	803,005
Other borrowings	47,023				47,023
Accrued interest and other liabilities	5,337				8,459
Total liabilities assumed	855,031				858,487
Total equity assumed	0				107,519
Total liabilities and equity assumed	855,031				966,006
Net assets acquired	113,741
Purchase price	145,195
Goodwill	31,454			31,500
Landmark Community Bank | Core deposit intangible
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Core deposit intangible	4,159				88
Landmark Community Bank | Fair Value Adjustments
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash and due from banks	0
Due from banks - time	0
Investment securities	(125)
Loans acquired	3,953
Allowance for credit losses on loans	3,621
Premises and equipment	(4,099)
Bank owned life insurance	0
Other assets	(4,655)
Total assets acquired	2,766
Liabilities Assumed
Non-interest bearing transaction accounts	0
Interest bearing transaction accounts and savings deposits	0
Time deposits	(334)
Total deposits	(334)
Other borrowings	0
Accrued interest and other liabilities	(3,122)
Total liabilities assumed	(3,456)
Total equity assumed	(107,519)
Total liabilities and equity assumed	(110,975)
Landmark Community Bank | Fair Value Adjustments | Core deposit intangible
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Core deposit intangible	4,071
Triumph Bancshares, Inc.
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash and due from banks	7,484				7,484
Due from banks - time	495				495
Investment securities	129,455				130,571
Loans acquired	698,786			698,800	702,460
Allowance for credit losses on loans	(11,092)				(12,617)
Premises and equipment	3,258				2,774
Goodwill	0				1,550
Other assets	13,400				12,806
Total assets acquired	846,922			846,900	845,523
Liabilities Assumed
Non-interest bearing transaction accounts	115,729				115,729
Interest bearing transaction accounts and savings deposits	383,434				383,434
Time deposits	220,571				219,477
Total deposits	719,734			719,700	718,640
Other borrowings	2,854				2,854
Subordinated debentures	30,700				30,700
Accrued interest and other liabilities	3,337				2,882
Total liabilities assumed	756,625				755,076
Total equity assumed	0				90,446
Total liabilities and equity assumed	756,625				845,522
Net assets acquired	90,297
Purchase price	130,544
Goodwill	40,247			$ 40,200
Triumph Bancshares, Inc. | Core deposit intangible
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Core deposit intangible	5,136				$ 0
Triumph Bancshares, Inc. | Fair Value Adjustments
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash and due from banks	0
Due from banks - time	0
Investment securities	(1,116)
Loans acquired	(3,674)
Allowance for credit losses on loans	1,525
Premises and equipment	484
Goodwill	(1,550)
Other assets	594
Total assets acquired	1,399
Liabilities Assumed
Non-interest bearing transaction accounts	0
Interest bearing transaction accounts and savings deposits	0
Time deposits	1,094
Total deposits	1,094
Other borrowings	0
Subordinated debentures	0
Accrued interest and other liabilities	455
Total liabilities assumed	1,549
Total equity assumed	(90,446)
Total liabilities and equity assumed	(88,897)
Triumph Bancshares, Inc. | Fair Value Adjustments | Core deposit intangible
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Core deposit intangible	$ 5,136