Loans - Credit risk profile by risk grade of commercial loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2017	Dec. 31, 2015
Loans
Amortized Cost Basis by Origination Year - 2020	$ 667,906
Amortized Cost Basis by Origination Year - 2019	2,798,841
Amortized Cost Basis by Origination Year - 2018	2,049,170
Amortized Cost Basis by Origination Year - 2017	1,522,491
Amortized Cost Basis by Origination Year - 2016	1,206,470
Amortized Cost Basis by Origination Year - Prior	2,051,452
Amortized Cost Basis by Origination Year - Revolving	1,210,560
Total loans - ASU 2016-13	11,506,890
Current-period gross charge-offs - 2020	(37)
Current-period gross charge-offs - 2019	(105)
Current-period gross charge-offs - 2018	(370)
Current-period gross charge-offs - 2017	(57)
Current-period gross charge-offs - 2016	(30)
Current-period gross charge-offs - Prior	(1,110)
Current-period gross charge-offs - Revolving	(1,514)
Current-period gross charge-offs	(3,223)
Current-period recoveries - 2019	50
Current-period recoveries - 2018	6
Current-period recoveries - 2017	36
Current-period recoveries - 2016	80
Current-period recoveries - Prior	1,352
Current-period recoveries - Revolving	385
Current-period recoveries	1,909
Current-period net (charge-offs) / recoveries - 2020	(37)
Current-period net (charge-offs) / recoveries - 2019	(55)
Current-period net (charge-offs) / recoveries - 2018	(364)
Current-period net (charge-offs) / recoveries - 2017	(21)
Current-period net (charge-offs) / recoveries - 2016	50
Current-period net (charge-offs) / recoveries - Prior	242
Current-period net (charge-offs) / recoveries - Revolving	(1,129)
Current-period net (charge-offs) / recoveries	(1,314)
Construction and land development
Loans
Total loans - ASU 2016-13	1,105,308
Other income producing property
Loans
Total loans - ASU 2016-13	327,696
Consumer Owner Occupied Loans
Loans
Total loans - ASU 2016-13	2,665,405
Commercial loans
Loans
Amortized Cost Basis by Origination Year - 2020	481,769
Amortized Cost Basis by Origination Year - 2019	1,991,768
Amortized Cost Basis by Origination Year - 2018	1,350,616
Amortized Cost Basis by Origination Year - 2017	940,684
Amortized Cost Basis by Origination Year - 2016	792,146
Amortized Cost Basis by Origination Year - Prior	976,182
Amortized Cost Basis by Origination Year - Revolving	509,301
Total loans - ASU 2016-13	7,042,466
Current-period gross charge-offs - 2020	(37)
Current-period gross charge-offs - 2019	(3)
Current-period gross charge-offs - 2018	(14)
Current-period gross charge-offs - Prior	(324)
Current-period gross charge-offs - Revolving	(73)
Current-period gross charge-offs	(451)
Current-period recoveries - 2019	50
Current-period recoveries - 2018	5
Current-period recoveries - 2017	33
Current-period recoveries - 2016	76
Current-period recoveries - Prior	577
Current-period recoveries - Revolving	5
Current-period recoveries	746
Current-period net (charge-offs) / recoveries - 2020	(37)
Current-period net (charge-offs) / recoveries - 2019	47
Current-period net (charge-offs) / recoveries - 2018	(9)
Current-period net (charge-offs) / recoveries - 2017	33
Current-period net (charge-offs) / recoveries - 2016	76
Current-period net (charge-offs) / recoveries - Prior	253
Current-period net (charge-offs) / recoveries - Revolving	(68)
Current-period net (charge-offs) / recoveries	295
Commercial loans | Pass
Loans
Amortized Cost Basis by Origination Year - 2020	467,415
Amortized Cost Basis by Origination Year - 2019	1,953,613
Amortized Cost Basis by Origination Year - 2018	1,324,952
Amortized Cost Basis by Origination Year - 2017	915,211
Amortized Cost Basis by Origination Year - 2016	782,436
Amortized Cost Basis by Origination Year - Prior	937,626
Amortized Cost Basis by Origination Year - Revolving	499,684
Total loans - ASU 2016-13	6,880,937
Commercial loans | Special mention
Loans
Amortized Cost Basis by Origination Year - 2020	11,763
Amortized Cost Basis by Origination Year - 2019	28,098
Amortized Cost Basis by Origination Year - 2018	18,735
Amortized Cost Basis by Origination Year - 2017	13,652
Amortized Cost Basis by Origination Year - 2016	8,080
Amortized Cost Basis by Origination Year - Prior	27,370
Amortized Cost Basis by Origination Year - Revolving	6,407
Total loans - ASU 2016-13	114,105
Commercial loans | Substandard
Loans
Amortized Cost Basis by Origination Year - 2020	2,591
Amortized Cost Basis by Origination Year - 2019	10,057
Amortized Cost Basis by Origination Year - 2018	6,928
Amortized Cost Basis by Origination Year - 2017	11,817
Amortized Cost Basis by Origination Year - 2016	1,627
Amortized Cost Basis by Origination Year - Prior	11,157
Amortized Cost Basis by Origination Year - Revolving	3,209
Total loans - ASU 2016-13	47,386
Commercial loans | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2018	1
Amortized Cost Basis by Origination Year - 2017	4
Amortized Cost Basis by Origination Year - 2016	3
Amortized Cost Basis by Origination Year - Prior	29
Amortized Cost Basis by Origination Year - Revolving	1
Total loans - ASU 2016-13	38
Commercial loans | Construction and land development
Loans
Amortized Cost Basis by Origination Year - 2020	81,525
Amortized Cost Basis by Origination Year - 2019	309,475
Amortized Cost Basis by Origination Year - 2018	234,411
Amortized Cost Basis by Origination Year - 2017	49,494
Amortized Cost Basis by Origination Year - 2016	18,476
Amortized Cost Basis by Origination Year - Prior	20,794
Amortized Cost Basis by Origination Year - Revolving	39,789
Total loans - ASU 2016-13	753,964
Current-period gross charge-offs - 2020	(37)
Current-period gross charge-offs	(37)
Current-period recoveries - 2017		$ 6
Current-period recoveries - Prior			$ 206
Current-period recoveries	212
Current-period net (charge-offs) / recoveries - 2020	(37)
Current-period net (charge-offs) / recoveries - 2017		$ 6
Current-period net (charge-offs) / recoveries - Prior			$ 206
Current-period net (charge-offs) / recoveries	175
Commercial loans | Construction and land development | Pass
Loans
Amortized Cost Basis by Origination Year - 2020	78,673
Amortized Cost Basis by Origination Year - 2019	307,578
Amortized Cost Basis by Origination Year - 2018	232,414
Amortized Cost Basis by Origination Year - 2017	47,764
Amortized Cost Basis by Origination Year - 2016	18,265
Amortized Cost Basis by Origination Year - Prior	19,662
Amortized Cost Basis by Origination Year - Revolving	39,789
Total loans - ASU 2016-13	744,145
Commercial loans | Construction and land development | Special mention
Loans
Amortized Cost Basis by Origination Year - 2020	1,967
Amortized Cost Basis by Origination Year - 2019	954
Amortized Cost Basis by Origination Year - 2018	1,439
Amortized Cost Basis by Origination Year - 2017	535
Amortized Cost Basis by Origination Year - 2016	160
Amortized Cost Basis by Origination Year - Prior	693
Total loans - ASU 2016-13	5,748
Commercial loans | Construction and land development | Substandard
Loans
Amortized Cost Basis by Origination Year - 2020	885
Amortized Cost Basis by Origination Year - 2019	943
Amortized Cost Basis by Origination Year - 2018	558
Amortized Cost Basis by Origination Year - 2017	1,195
Amortized Cost Basis by Origination Year - 2016	51
Amortized Cost Basis by Origination Year - Prior	430
Total loans - ASU 2016-13	4,062
Commercial loans | Construction and land development | Doubtful
Loans
Amortized Cost Basis by Origination Year - Prior	9
Total loans - ASU 2016-13	9
Commercial loans | Commercial non-owner occupied
Loans
Amortized Cost Basis by Origination Year - 2020	99,634
Amortized Cost Basis by Origination Year - 2019	646,830
Amortized Cost Basis by Origination Year - 2018	427,440
Amortized Cost Basis by Origination Year - 2017	388,386
Amortized Cost Basis by Origination Year - 2016	340,035
Amortized Cost Basis by Origination Year - Prior	398,895
Amortized Cost Basis by Origination Year - Revolving	70,151
Total loans - ASU 2016-13	2,371,371
Current-period recoveries - Prior	79
Current-period recoveries - Revolving	79
Current-period net (charge-offs) / recoveries - Prior	79
Current-period net (charge-offs) / recoveries	79
Commercial loans | Commercial non-owner occupied | Pass
Loans
Amortized Cost Basis by Origination Year - 2020	94,375
Amortized Cost Basis by Origination Year - 2019	637,401
Amortized Cost Basis by Origination Year - 2018	419,596
Amortized Cost Basis by Origination Year - 2017	385,069
Amortized Cost Basis by Origination Year - 2016	339,042
Amortized Cost Basis by Origination Year - Prior	381,430
Amortized Cost Basis by Origination Year - Revolving	70,151
Total loans - ASU 2016-13	2,327,064
Commercial loans | Commercial non-owner occupied | Special mention
Loans
Amortized Cost Basis by Origination Year - 2020	5,145
Amortized Cost Basis by Origination Year - 2019	8,905
Amortized Cost Basis by Origination Year - 2018	7,094
Amortized Cost Basis by Origination Year - 2017	1,278
Amortized Cost Basis by Origination Year - 2016	488
Amortized Cost Basis by Origination Year - Prior	15,162
Total loans - ASU 2016-13	38,072
Commercial loans | Commercial non-owner occupied | Substandard
Loans
Amortized Cost Basis by Origination Year - 2020	114
Amortized Cost Basis by Origination Year - 2019	524
Amortized Cost Basis by Origination Year - 2018	750
Amortized Cost Basis by Origination Year - 2017	2,039
Amortized Cost Basis by Origination Year - 2016	505
Amortized Cost Basis by Origination Year - Prior	2,299
Total loans - ASU 2016-13	6,231
Commercial loans | Commercial non-owner occupied | Doubtful
Loans
Amortized Cost Basis by Origination Year - Prior	4
Total loans - ASU 2016-13	4
Commercial loans | Commercial owner occupied real estate loan
Loans
Amortized Cost Basis by Origination Year - 2020	152,385
Amortized Cost Basis by Origination Year - 2019	554,878
Amortized Cost Basis by Origination Year - 2018	396,656
Amortized Cost Basis by Origination Year - 2017	338,596
Amortized Cost Basis by Origination Year - 2016	285,384
Amortized Cost Basis by Origination Year - Prior	411,296
Amortized Cost Basis by Origination Year - Revolving	38,543
Total loans - ASU 2016-13	2,177,738
Current-period gross charge-offs - Prior	(315)
Current-period gross charge-offs	(315)
Current-period recoveries - 2019	24
Current-period recoveries - 2018	5
Current-period recoveries - Prior	59
Current-period recoveries	88
Current-period net (charge-offs) / recoveries - 2019	24
Current-period net (charge-offs) / recoveries - 2018	5
Current-period net (charge-offs) / recoveries - Prior	(256)
Current-period net (charge-offs) / recoveries	(227)
Commercial loans | Commercial owner occupied real estate loan | Pass
Loans
Amortized Cost Basis by Origination Year - 2020	149,781
Amortized Cost Basis by Origination Year - 2019	544,487
Amortized Cost Basis by Origination Year - 2018	389,294
Amortized Cost Basis by Origination Year - 2017	326,347
Amortized Cost Basis by Origination Year - 2016	278,186
Amortized Cost Basis by Origination Year - Prior	402,083
Amortized Cost Basis by Origination Year - Revolving	38,039
Total loans - ASU 2016-13	2,128,217
Commercial loans | Commercial owner occupied real estate loan | Special mention
Loans
Amortized Cost Basis by Origination Year - 2020	2,344
Amortized Cost Basis by Origination Year - 2019	3,855
Amortized Cost Basis by Origination Year - 2018	4,718
Amortized Cost Basis by Origination Year - 2017	6,848
Amortized Cost Basis by Origination Year - 2016	6,592
Amortized Cost Basis by Origination Year - Prior	4,557
Amortized Cost Basis by Origination Year - Revolving	154
Total loans - ASU 2016-13	29,068
Commercial loans | Commercial owner occupied real estate loan | Substandard
Loans
Amortized Cost Basis by Origination Year - 2020	260
Amortized Cost Basis by Origination Year - 2019	6,536
Amortized Cost Basis by Origination Year - 2018	2,644
Amortized Cost Basis by Origination Year - 2017	5,401
Amortized Cost Basis by Origination Year - 2016	606
Amortized Cost Basis by Origination Year - Prior	4,651
Amortized Cost Basis by Origination Year - Revolving	350
Total loans - ASU 2016-13	20,448
Commercial loans | Commercial owner occupied real estate loan | Doubtful
Loans
Amortized Cost Basis by Origination Year - Prior	5
Total loans - ASU 2016-13	5
Commercial loans | Commercial and industrial
Loans
Amortized Cost Basis by Origination Year - 2020	118,713
Amortized Cost Basis by Origination Year - 2019	404,869
Amortized Cost Basis by Origination Year - 2018	236,132
Amortized Cost Basis by Origination Year - 2017	124,186
Amortized Cost Basis by Origination Year - 2016	122,437
Amortized Cost Basis by Origination Year - Prior	76,204
Amortized Cost Basis by Origination Year - Revolving	335,880
Total loans - ASU 2016-13	1,418,421
Current-period gross charge-offs - 2019	(3)
Current-period gross charge-offs - 2018	(14)
Current-period gross charge-offs - Prior	(9)
Current-period gross charge-offs - Revolving	(73)
Current-period gross charge-offs	(99)
Current-period recoveries - 2019	26
Current-period recoveries - 2017	4
Current-period recoveries - 2016	75
Current-period recoveries - Prior	89
Current-period recoveries - Revolving	4
Current-period recoveries	198
Current-period net (charge-offs) / recoveries - 2019	23
Current-period net (charge-offs) / recoveries - 2018	(14)
Current-period net (charge-offs) / recoveries - 2017	4
Current-period net (charge-offs) / recoveries - 2016	75
Current-period net (charge-offs) / recoveries - Prior	80
Current-period net (charge-offs) / recoveries - Revolving	(69)
Current-period net (charge-offs) / recoveries	99
Commercial loans | Commercial and industrial | Pass
Loans
Amortized Cost Basis by Origination Year - 2020	117,663
Amortized Cost Basis by Origination Year - 2019	396,201
Amortized Cost Basis by Origination Year - 2018	231,025
Amortized Cost Basis by Origination Year - 2017	118,471
Amortized Cost Basis by Origination Year - 2016	122,025
Amortized Cost Basis by Origination Year - Prior	74,688
Amortized Cost Basis by Origination Year - Revolving	327,219
Total loans - ASU 2016-13	1,387,292
Commercial loans | Commercial and industrial | Special mention
Loans
Amortized Cost Basis by Origination Year - 2020	609
Amortized Cost Basis by Origination Year - 2019	7,993
Amortized Cost Basis by Origination Year - 2018	3,067
Amortized Cost Basis by Origination Year - 2017	4,193
Amortized Cost Basis by Origination Year - 2016	179
Amortized Cost Basis by Origination Year - Prior	914
Amortized Cost Basis by Origination Year - Revolving	5,850
Total loans - ASU 2016-13	22,805
Commercial loans | Commercial and industrial | Substandard
Loans
Amortized Cost Basis by Origination Year - 2020	441
Amortized Cost Basis by Origination Year - 2019	675
Amortized Cost Basis by Origination Year - 2018	2,039
Amortized Cost Basis by Origination Year - 2017	1,519
Amortized Cost Basis by Origination Year - 2016	230
Amortized Cost Basis by Origination Year - Prior	598
Amortized Cost Basis by Origination Year - Revolving	2,810
Total loans - ASU 2016-13	8,312
Commercial loans | Commercial and industrial | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2018	1
Amortized Cost Basis by Origination Year - 2017	3
Amortized Cost Basis by Origination Year - 2016	3
Amortized Cost Basis by Origination Year - Prior	4
Amortized Cost Basis by Origination Year - Revolving	1
Total loans - ASU 2016-13	12
Commercial loans | Other income producing property
Loans
Amortized Cost Basis by Origination Year - 2020	20,245
Amortized Cost Basis by Origination Year - 2019	65,091
Amortized Cost Basis by Origination Year - 2018	54,886
Amortized Cost Basis by Origination Year - 2017	39,391
Amortized Cost Basis by Origination Year - 2016	24,081
Amortized Cost Basis by Origination Year - Prior	62,920
Amortized Cost Basis by Origination Year - Revolving	7,915
Total loans - ASU 2016-13	274,529
Current-period recoveries - Prior	139
Current-period recoveries	139
Current-period net (charge-offs) / recoveries - Prior	139
Current-period net (charge-offs) / recoveries	139
Commercial loans | Other income producing property | Pass
Loans
Amortized Cost Basis by Origination Year - 2020	17,679
Amortized Cost Basis by Origination Year - 2019	61,806
Amortized Cost Basis by Origination Year - 2018	51,950
Amortized Cost Basis by Origination Year - 2017	37,084
Amortized Cost Basis by Origination Year - 2016	23,250
Amortized Cost Basis by Origination Year - Prior	54,295
Amortized Cost Basis by Origination Year - Revolving	7,829
Total loans - ASU 2016-13	253,893
Commercial loans | Other income producing property | Special mention
Loans
Amortized Cost Basis by Origination Year - 2020	1,675
Amortized Cost Basis by Origination Year - 2019	2,300
Amortized Cost Basis by Origination Year - 2018	2,163
Amortized Cost Basis by Origination Year - 2017	735
Amortized Cost Basis by Origination Year - 2016	661
Amortized Cost Basis by Origination Year - Prior	5,848
Amortized Cost Basis by Origination Year - Revolving	37
Total loans - ASU 2016-13	13,419
Commercial loans | Other income producing property | Substandard
Loans
Amortized Cost Basis by Origination Year - 2020	891
Amortized Cost Basis by Origination Year - 2019	985
Amortized Cost Basis by Origination Year - 2018	773
Amortized Cost Basis by Origination Year - 2017	1,572
Amortized Cost Basis by Origination Year - 2016	170
Amortized Cost Basis by Origination Year - Prior	2,770
Amortized Cost Basis by Origination Year - Revolving	49
Total loans - ASU 2016-13	7,210
Commercial loans | Other income producing property | Doubtful
Loans
Amortized Cost Basis by Origination Year - Prior	7
Total loans - ASU 2016-13	7
Commercial loans | Consumer Owner Occupied Loans
Loans
Amortized Cost Basis by Origination Year - 2020	1,589
Amortized Cost Basis by Origination Year - 2019	10,625
Amortized Cost Basis by Origination Year - 2018	1,091
Amortized Cost Basis by Origination Year - 2017	631
Amortized Cost Basis by Origination Year - 2016	1,733
Amortized Cost Basis by Origination Year - Prior	6,073
Amortized Cost Basis by Origination Year - Revolving	17,023
Total loans - ASU 2016-13	38,765
Current-period recoveries - 2017	23
Current-period recoveries - 2016	1
Current-period recoveries - Prior	5
Current-period recoveries - Revolving	1
Current-period recoveries	30
Current-period net (charge-offs) / recoveries - 2017	23
Current-period net (charge-offs) / recoveries - 2016	1
Current-period net (charge-offs) / recoveries - Prior	5
Current-period net (charge-offs) / recoveries - Revolving	1
Current-period net (charge-offs) / recoveries	30
Commercial loans | Consumer Owner Occupied Loans | Pass
Loans
Amortized Cost Basis by Origination Year - 2020	1,566
Amortized Cost Basis by Origination Year - 2019	6,140
Amortized Cost Basis by Origination Year - 2018	673
Amortized Cost Basis by Origination Year - 2017	476
Amortized Cost Basis by Origination Year - 2016	1,668
Amortized Cost Basis by Origination Year - Prior	5,468
Amortized Cost Basis by Origination Year - Revolving	16,657
Total loans - ASU 2016-13	32,648
Commercial loans | Consumer Owner Occupied Loans | Special mention
Loans
Amortized Cost Basis by Origination Year - 2020	23
Amortized Cost Basis by Origination Year - 2019	4,091
Amortized Cost Basis by Origination Year - 2018	254
Amortized Cost Basis by Origination Year - 2017	63
Amortized Cost Basis by Origination Year - Prior	196
Amortized Cost Basis by Origination Year - Revolving	366
Total loans - ASU 2016-13	4,993
Commercial loans | Consumer Owner Occupied Loans | Substandard
Loans
Amortized Cost Basis by Origination Year - 2019	394
Amortized Cost Basis by Origination Year - 2018	164
Amortized Cost Basis by Origination Year - 2017	91
Amortized Cost Basis by Origination Year - 2016	65
Amortized Cost Basis by Origination Year - Prior	409
Total loans - ASU 2016-13	1,123
Commercial loans | Consumer Owner Occupied Loans | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2017	1
Total loans - ASU 2016-13	1
Commercial loans | Other loans
Loans
Amortized Cost Basis by Origination Year - 2020	7,678
Total loans - ASU 2016-13	7,678
Commercial loans | Other loans | Pass
Loans
Amortized Cost Basis by Origination Year - 2020	7,678
Total loans - ASU 2016-13	7,678
Consumer
Loans
Amortized Cost Basis by Origination Year - 2020	186,137
Amortized Cost Basis by Origination Year - 2019	807,073
Amortized Cost Basis by Origination Year - 2018	698,554
Amortized Cost Basis by Origination Year - 2017	581,807
Amortized Cost Basis by Origination Year - 2016	414,324
Amortized Cost Basis by Origination Year - Prior	1,075,270
Amortized Cost Basis by Origination Year - Revolving	701,259
Total loans - ASU 2016-13	4,464,424
Current-period gross charge-offs - 2019	(102)
Current-period gross charge-offs - 2018	(356)
Current-period gross charge-offs - 2017	(57)
Current-period gross charge-offs - 2016	(30)
Current-period gross charge-offs - Prior	(786)
Current-period gross charge-offs - Revolving	(1,441)
Current-period gross charge-offs	(2,772)
Current-period recoveries - 2018	1
Current-period recoveries - 2017	3
Current-period recoveries - 2016	4
Current-period recoveries - Prior	775
Current-period recoveries - Revolving	380
Current-period recoveries	1,163
Current-period net (charge-offs) / recoveries - 2019	(102)
Current-period net (charge-offs) / recoveries - 2018	(355)
Current-period net (charge-offs) / recoveries - 2017	(54)
Current-period net (charge-offs) / recoveries - 2016	(26)
Current-period net (charge-offs) / recoveries - Prior	(11)
Current-period net (charge-offs) / recoveries - Revolving	(1,061)
Current-period net (charge-offs) / recoveries	(1,609)
Consumer | Current
Loans
Amortized Cost Basis by Origination Year - 2020	185,994
Amortized Cost Basis by Origination Year - 2019	806,411
Amortized Cost Basis by Origination Year - 2018	697,765
Amortized Cost Basis by Origination Year - 2017	580,070
Amortized Cost Basis by Origination Year - 2016	413,388
Amortized Cost Basis by Origination Year - Prior	1,058,475
Amortized Cost Basis by Origination Year - Revolving	698,828
Total loans - ASU 2016-13	4,440,931
Consumer | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2020	71
Amortized Cost Basis by Origination Year - 2019	339
Amortized Cost Basis by Origination Year - 2018	414
Amortized Cost Basis by Origination Year - 2017	766
Amortized Cost Basis by Origination Year - 2016	95
Amortized Cost Basis by Origination Year - Prior	7,800
Amortized Cost Basis by Origination Year - Revolving	1,085
Total loans - ASU 2016-13	10,570
Consumer | 60 days past due
Loans
Amortized Cost Basis by Origination Year - 2019	94
Amortized Cost Basis by Origination Year - 2018	51
Amortized Cost Basis by Origination Year - 2017	37
Amortized Cost Basis by Origination Year - 2016	12
Amortized Cost Basis by Origination Year - Prior	3,489
Amortized Cost Basis by Origination Year - Revolving	639
Total loans - ASU 2016-13	4,322
Consumer | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2020	72
Amortized Cost Basis by Origination Year - 2019	229
Amortized Cost Basis by Origination Year - 2018	324
Amortized Cost Basis by Origination Year - 2017	934
Amortized Cost Basis by Origination Year - 2016	829
Amortized Cost Basis by Origination Year - Prior	5,506
Amortized Cost Basis by Origination Year - Revolving	707
Total loans - ASU 2016-13	8,601
Consumer | Construction and land development
Loans
Amortized Cost Basis by Origination Year - 2020	25,564
Amortized Cost Basis by Origination Year - 2019	212,413
Amortized Cost Basis by Origination Year - 2018	68,350
Amortized Cost Basis by Origination Year - 2017	16,477
Amortized Cost Basis by Origination Year - 2016	5,830
Amortized Cost Basis by Origination Year - Prior	22,710
Total loans - ASU 2016-13	351,344
Current-period gross charge-offs - Prior	(68)
Current-period gross charge-offs	(68)
Current-period recoveries - Prior	70
Current-period recoveries	70
Current-period net (charge-offs) / recoveries - Prior	2
Current-period net (charge-offs) / recoveries	2
Consumer | Construction and land development | Current
Loans
Amortized Cost Basis by Origination Year - 2020	25,564
Amortized Cost Basis by Origination Year - 2019	212,413
Amortized Cost Basis by Origination Year - 2018	68,321
Amortized Cost Basis by Origination Year - 2017	16,477
Amortized Cost Basis by Origination Year - 2016	5,830
Amortized Cost Basis by Origination Year - Prior	22,346
Total loans - ASU 2016-13	350,951
Consumer | Construction and land development | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2018	29
Amortized Cost Basis by Origination Year - Prior	237
Total loans - ASU 2016-13	266
Consumer | Construction and land development | 90 days past due
Loans
Amortized Cost Basis by Origination Year - Prior	127
Total loans - ASU 2016-13	127
Consumer | Other income producing property
Loans
Amortized Cost Basis by Origination Year - 2020	346
Amortized Cost Basis by Origination Year - 2019	2,488
Amortized Cost Basis by Origination Year - 2018	2,703
Amortized Cost Basis by Origination Year - 2017	4,537
Amortized Cost Basis by Origination Year - 2016	4,032
Amortized Cost Basis by Origination Year - Prior	39,061
Total loans - ASU 2016-13	53,167
Current-period recoveries - Prior	23
Current-period recoveries	23
Current-period net (charge-offs) / recoveries - Prior	23
Current-period net (charge-offs) / recoveries	23
Consumer | Other income producing property | Current
Loans
Amortized Cost Basis by Origination Year - 2020	346
Amortized Cost Basis by Origination Year - 2019	2,488
Amortized Cost Basis by Origination Year - 2018	2,703
Amortized Cost Basis by Origination Year - 2017	4,537
Amortized Cost Basis by Origination Year - 2016	4,032
Amortized Cost Basis by Origination Year - Prior	38,955
Total loans - ASU 2016-13	53,061
Consumer | Other income producing property | 30 days past due
Loans
Amortized Cost Basis by Origination Year - Prior	105
Total loans - ASU 2016-13	105
Consumer | Other income producing property | 90 days past due
Loans
Amortized Cost Basis by Origination Year - Prior	1
Total loans - ASU 2016-13	1
Consumer | Consumer Owner Occupied Loans
Loans
Amortized Cost Basis by Origination Year - 2020	101,326
Amortized Cost Basis by Origination Year - 2019	373,895
Amortized Cost Basis by Origination Year - 2018	498,277
Amortized Cost Basis by Origination Year - 2017	493,170
Amortized Cost Basis by Origination Year - 2016	361,543
Amortized Cost Basis by Origination Year - Prior	798,429
Total loans - ASU 2016-13	2,626,640
Current-period gross charge-offs - Prior	(304)
Current-period gross charge-offs	(304)
Current-period recoveries - Prior	223
Current-period recoveries	223
Current-period net (charge-offs) / recoveries - Prior	(81)
Current-period net (charge-offs) / recoveries	(81)
Consumer | Consumer Owner Occupied Loans | Current
Loans
Amortized Cost Basis by Origination Year - 2020	101,254
Amortized Cost Basis by Origination Year - 2019	373,790
Amortized Cost Basis by Origination Year - 2018	498,020
Amortized Cost Basis by Origination Year - 2017	492,026
Amortized Cost Basis by Origination Year - 2016	361,132
Amortized Cost Basis by Origination Year - Prior	789,977
Total loans - ASU 2016-13	2,616,199
Consumer | Consumer Owner Occupied Loans | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2019	27
Amortized Cost Basis by Origination Year - 2018	169
Amortized Cost Basis by Origination Year - 2017	476
Amortized Cost Basis by Origination Year - Prior	5,117
Total loans - ASU 2016-13	5,789
Consumer | Consumer Owner Occupied Loans | 60 days past due
Loans
Amortized Cost Basis by Origination Year - Prior	468
Total loans - ASU 2016-13	468
Consumer | Consumer Owner Occupied Loans | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2020	72
Amortized Cost Basis by Origination Year - 2019	78
Amortized Cost Basis by Origination Year - 2018	88
Amortized Cost Basis by Origination Year - 2017	668
Amortized Cost Basis by Origination Year - 2016	411
Amortized Cost Basis by Origination Year - Prior	2,867
Total loans - ASU 2016-13	4,184
Consumer | Home equity loans
Loans
Amortized Cost Basis by Origination Year - 2020	2,033
Amortized Cost Basis by Origination Year - 2019	8,190
Amortized Cost Basis by Origination Year - 2018	11,730
Amortized Cost Basis by Origination Year - 2017	3,753
Amortized Cost Basis by Origination Year - 2016	744
Amortized Cost Basis by Origination Year - Prior	41,892
Amortized Cost Basis by Origination Year - Revolving	690,140
Total loans - ASU 2016-13	758,482
Current-period gross charge-offs - 2019	(22)
Current-period gross charge-offs - 2018	(260)
Current-period gross charge-offs - Prior	(67)
Current-period gross charge-offs - Revolving	(265)
Current-period gross charge-offs	(614)
Current-period recoveries - 2017	1
Current-period recoveries - 2016	1
Current-period recoveries - Prior	375
Current-period recoveries - Revolving	1
Current-period recoveries	378
Current-period net (charge-offs) / recoveries - 2019	(22)
Current-period net (charge-offs) / recoveries - 2018	(260)
Current-period net (charge-offs) / recoveries - 2017	1
Current-period net (charge-offs) / recoveries - 2016	1
Current-period net (charge-offs) / recoveries - Prior	308
Current-period net (charge-offs) / recoveries - Revolving	(264)
Current-period net (charge-offs) / recoveries	(236)
Consumer | Home equity loans | Current
Loans
Amortized Cost Basis by Origination Year - 2020	1,976
Amortized Cost Basis by Origination Year - 2019	8,007
Amortized Cost Basis by Origination Year - 2018	11,699
Amortized Cost Basis by Origination Year - 2017	3,536
Amortized Cost Basis by Origination Year - 2016	429
Amortized Cost Basis by Origination Year - Prior	37,322
Amortized Cost Basis by Origination Year - Revolving	687,900
Total loans - ASU 2016-13	750,869
Consumer | Home equity loans | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2020	57
Amortized Cost Basis by Origination Year - 2019	90
Amortized Cost Basis by Origination Year - 2018	31
Amortized Cost Basis by Origination Year - 2017	183
Amortized Cost Basis by Origination Year - Prior	1,078
Amortized Cost Basis by Origination Year - Revolving	920
Total loans - ASU 2016-13	2,359
Consumer | Home equity loans | 60 days past due
Loans
Amortized Cost Basis by Origination Year - 2019	68
Amortized Cost Basis by Origination Year - Prior	2,107
Amortized Cost Basis by Origination Year - Revolving	613
Total loans - ASU 2016-13	2,788
Consumer | Home equity loans | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2019	25
Amortized Cost Basis by Origination Year - 2017	34
Amortized Cost Basis by Origination Year - 2016	315
Amortized Cost Basis by Origination Year - Prior	1,385
Amortized Cost Basis by Origination Year - Revolving	707
Total loans - ASU 2016-13	2,466
Consumer | Consumer
Loans
Amortized Cost Basis by Origination Year - 2020	56,868
Amortized Cost Basis by Origination Year - 2019	210,087
Amortized Cost Basis by Origination Year - 2018	117,494
Amortized Cost Basis by Origination Year - 2017	63,870
Amortized Cost Basis by Origination Year - 2016	42,175
Amortized Cost Basis by Origination Year - Prior	173,178
Amortized Cost Basis by Origination Year - Revolving	11,119
Total loans - ASU 2016-13	674,791
Current-period gross charge-offs - 2019	(80)
Current-period gross charge-offs - 2018	(96)
Current-period gross charge-offs - 2017	(57)
Current-period gross charge-offs - 2016	(30)
Current-period gross charge-offs - Prior	(347)
Current-period gross charge-offs - Revolving	(1,176)
Current-period gross charge-offs	(1,786)
Current-period recoveries - 2018	1
Current-period recoveries - 2017	2
Current-period recoveries - 2016	3
Current-period recoveries - Prior	84
Current-period recoveries - Revolving	379
Current-period recoveries	469
Current-period net (charge-offs) / recoveries - 2019	(80)
Current-period net (charge-offs) / recoveries - 2018	(95)
Current-period net (charge-offs) / recoveries - 2017	(55)
Current-period net (charge-offs) / recoveries - 2016	(27)
Current-period net (charge-offs) / recoveries - Prior	(263)
Current-period net (charge-offs) / recoveries - Revolving	(797)
Current-period net (charge-offs) / recoveries	(1,317)
Consumer | Consumer | Current
Loans
Amortized Cost Basis by Origination Year - 2020	56,854
Amortized Cost Basis by Origination Year - 2019	209,713
Amortized Cost Basis by Origination Year - 2018	117,022
Amortized Cost Basis by Origination Year - 2017	63,494
Amortized Cost Basis by Origination Year - 2016	41,965
Amortized Cost Basis by Origination Year - Prior	169,875
Amortized Cost Basis by Origination Year - Revolving	10,928
Total loans - ASU 2016-13	669,851
Consumer | Consumer | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2020	14
Amortized Cost Basis by Origination Year - 2019	222
Amortized Cost Basis by Origination Year - 2018	185
Amortized Cost Basis by Origination Year - 2017	107
Amortized Cost Basis by Origination Year - 2016	95
Amortized Cost Basis by Origination Year - Prior	1,263
Amortized Cost Basis by Origination Year - Revolving	165
Total loans - ASU 2016-13	2,051
Consumer | Consumer | 60 days past due
Loans
Amortized Cost Basis by Origination Year - 2019	26
Amortized Cost Basis by Origination Year - 2018	51
Amortized Cost Basis by Origination Year - 2017	37
Amortized Cost Basis by Origination Year - 2016	12
Amortized Cost Basis by Origination Year - Prior	914
Amortized Cost Basis by Origination Year - Revolving	26
Total loans - ASU 2016-13	1,066
Consumer | Consumer | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2019	126
Amortized Cost Basis by Origination Year - 2018	236
Amortized Cost Basis by Origination Year - 2017	232
Amortized Cost Basis by Origination Year - 2016	103
Amortized Cost Basis by Origination Year - Prior	1,126
Total loans - ASU 2016-13	$ 1,823