Loans and Allowance for Credit Losses - Summary of Loans by Risk Category and Past Due Status (Details) $ in Thousands	Dec. 31, 2021 USD ($)
2021 YTD	$ 786,753
2020	739,912
2019	604,077
2018	531,179
2017	346,578
Prior	825,610
Revolving Loans	243,873
Total	4,077,982
Satisfactory
2021 YTD	786,753
2020	739,500
2019	603,351
2018	531,011
2017	346,492
Prior	792,592
Revolving Loans	242,877
Total	4,042,576
Watch
2020	410
2019	582
2018	152
2017	4
Prior	29,494
Revolving Loans	98
Total	30,740
Classified
2020	2
2019	144
2018	16
2017	82
Prior	3,524
Revolving Loans	898
Total	4,666
Commercial Real Estate
2021 YTD	141,868
2020	113,636
2019	221,162
2018	231,321
2017	196,166
Prior	549,293
Revolving Loans	22,785
Total	1,476,231
Commercial Real Estate | Satisfactory
2021 YTD	141,868
2020	113,226
2019	220,580
2018	231,321
2017	196,166
Prior	521,545
Revolving Loans	22,785
Total	1,447,491
Commercial Real Estate | Watch
2020	410
2019	582
Prior	25,742
Total	26,734
Commercial Real Estate | Classified
Prior	2,006
Total	2,006
Consumer Loan
2021 YTD	20,140
2020	11,140
2019	7,154
2018	9,101
2017	4,211
Prior	24,570
Revolving Loans	130,487
Total	206,803
Consumer Loan | Satisfactory
2021 YTD	20,140
2020	11,138
2019	7,154
2018	9,065
2017	4,175
Prior	24,280
Revolving Loans	130,111
Total	206,063
Consumer Loan | Watch
2018	20
2017	4
Prior	10
Revolving Loans	29
Total	63
Consumer Loan | Classified
2020	2
2018	16
2017	32
Prior	280
Revolving Loans	347
Total	677
One- to four-family residential construction
2021 YTD	23,081
2020	4,453
2019	763
Prior	5
Total	28,302
One- to four-family residential construction | Satisfactory
2021 YTD	23,081
2020	4,453
2019	763
Prior	5
Total	28,302
Subdivision construction
2021 YTD	24,129
2020	949
2019	224
2018	160
2017	252
Prior	980
Total	26,694
Subdivision construction | Satisfactory
2021 YTD	24,129
2020	949
2019	224
2018	160
2017	252
Prior	965
Total	26,679
Subdivision construction | Classified
Prior	15
Total	15
Construction and land development
2021 YTD	9,968
2020	15,965
2019	11,115
2018	2,591
2017	3,013
Prior	4,184
Revolving Loans	995
Total	47,831
Construction and land development | Satisfactory
2021 YTD	9,968
2020	15,965
2019	11,115
2018	2,591
2017	3,013
Prior	4,184
Revolving Loans	527
Total	47,363
Construction and land development | Classified
Revolving Loans	468
Total	468
Other Construction
2021 YTD	145,991
2020	298,710
2019	130,502
2018	42,302
Total	617,505
Other Construction | Satisfactory
2021 YTD	145,991
2020	298,710
2019	130,502
2018	42,302
Total	617,505
One- to four-family residential
2021 YTD	237,498
2020	169,765
2019	93,792
2018	49,750
2017	14,757
Prior	114,549
Revolving Loans	1,814
Total	681,925
One- to four-family residential | Satisfactory
2021 YTD	237,498
2020	169,765
2019	93,648
2018	49,618
2017	14,707
Prior	113,059
Revolving Loans	1,662
Total	679,957
One- to four-family residential | Watch
2018	132
Prior	267
Revolving Loans	69
Total	468
One- to four-family residential | Classified
2019	144
2017	50
Prior	1,223
Revolving Loans	83
Total	1,500
Other residential
2021 YTD	117,029
2020	96,551
2019	115,418
2018	179,441
2017	104,053
Prior	73,855
Revolving Loans	11,605
Total	697,952
Other residential | Satisfactory
2021 YTD	117,029
2020	96,551
2019	115,418
2018	179,441
2017	104,053
Prior	70,438
Revolving Loans	11,605
Total	694,535
Other residential | Watch
Prior	3,417
Total	3,417
Commercial business
2021 YTD	67,049
2020	28,743
2019	23,947
2018	16,513
2017	24,126
Prior	58,174
Revolving Loans	76,187
Total	294,739
Commercial business | Satisfactory
2021 YTD	67,049
2020	28,743
2019	23,947
2018	16,513
2017	24,126
Prior	58,116
Revolving Loans	76,187
Total	294,681
Commercial business | Watch
Prior	58
Total	$ 58