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Regulatory Matters - Schedule of Actual Capital Amounts and Ratios (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Triumph Bancorp, Inc.    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital (to risk weighted assets), actual amount $ 769,475 $ 715,142
Total capital (to risk weighted assets), actual ratio 0.141 0.130
Total capital (to risk weighted assets), minimum for capital adequacy purposes amount $ 436,582 $ 440,087
Total capital (to risk weighted assets), minimum for capital adequacy purposes ratio 0.080 0.080
Tier 1 capital (to risk weighted assets), actual amount $ 628,094 $ 581,580
Tier 1 capital (to risk weighted assets), actual ratio 0.115 0.106
Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes amount $ 327,701 $ 329,196
Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes ratio 0.060 0.060
Common equity Tier 1 capital (to risk weighted assets), actual amount $ 542,492 $ 496,508
Common equity Tier 1 capital (to risk weighted assets), actual ratio 0.099 0.090
Common equity Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes amount $ 246,587 $ 248,254
Common equity Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes ratio 4.50% 4.50%
Tier 1 capital (to average assets), actual amount $ 628,094 $ 581,580
Tier 1 capital (to average assets) , actual ratio 0.111 0.108
Tier 1 capital (to average assets), minimum for capital adequacy purposes amount $ 226,340 $ 215,400
Tier 1 capital (to average assets), minimum for capital adequacy purposes ratio 0.040 0.040
TBK Bank, SSB    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital (to risk weighted assets), actual amount $ 698,286 $ 653,359
Total capital (to risk weighted assets), actual ratio 0.129 0.121
Total capital (to risk weighted assets), minimum for capital adequacy purposes amount $ 433,046 $ 431,973
Total capital (to risk weighted assets), minimum for capital adequacy purposes ratio 0.080 0.080
Total capital (to risk weighted assets), amount to be well capitalized under prompt corrective action provisions $ 541,307 $ 539,966
Total capital (to risk weighted assets), ratio to be well capitalized under prompt corrective action provisions 0.100 0.100
Tier 1 capital (to risk weighted assets), actual amount $ 665,336 $ 608,737
Tier 1 capital (to risk weighted assets), actual ratio 0.123 0.113
Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes amount $ 324,554 $ 323,223
Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes ratio 0.060 0.060
Tier 1 capital (to risk weighted assets), amount to be well capitalized under prompt corrective action provisions $ 432,739 $ 430,964
Tier 1 capital (to risk weighted assets), ratio to be well capitalized under prompt corrective action provisions 0.080 0.080
Common equity Tier 1 capital (to risk weighted assets), actual amount $ 665,336 $ 608,737
Common equity Tier 1 capital (to risk weighted assets), actual ratio 0.123 0.113
Common equity Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes amount $ 243,416 $ 242,417
Common equity Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes ratio 4.50% 4.50%
Common equity Tier 1 capital (to risk weighted assets), amount to be well capitalized under prompt corrective action provisions $ 351,600 $ 350,158
Common equity Tier 1 capital (to risk weighted assets), ratio to be well capitalized under prompt corrective action provisions 6.50% 6.50%
Tier 1 capital (to average assets), actual amount $ 665,336 $ 608,737
Tier 1 capital (to average assets) , actual ratio 0.118 0.113
Tier 1 capital (to average assets), minimum for capital adequacy purposes amount $ 225,538 $ 215,482
Tier 1 capital (to average assets), minimum for capital adequacy purposes ratio 0.040 0.040
Tier 1 capital (to average assets), amount to be well capitalized under prompt corrective action provisions $ 281,922 $ 269,353
Tier 1 capital (to average assets), ratio to be well capitalized under prompt corrective action provisions 0.050 0.050