Non Purchased Loans - Aging of Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 10,021,105	$ 10,937,807
Unearned income	(4,281)	(4,160)
Loans, net of unearned income	10,016,824	10,933,647	$ 11,084,738
Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,436,019	2,536,984
Loans, net of unearned income	1,436,019		2,648,062
Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	83,496	80,022
Loans, net of unearned income	79,215		82,928
Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,091,296	858,104
Loans, net of unearned income	1,091,296		773,119
Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,724,743	2,698,308
Loans, net of unearned income	2,724,743		2,760,394
Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	4,535,730	4,554,852
Loans, net of unearned income	4,535,730		4,577,009
Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	149,821	209,537
Loans, net of unearned income	149,821		$ 243,226
Residential | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	307,825	246,673
Commercial | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	783,471	611,431
Primary | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,808,139	1,750,951
Home equity | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	481,552	513,160
Rental/investment | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	291,116	296,364
Owner-occupied | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,630,227	1,657,806
Non-owner occupied | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,779,237	2,747,467
Non purchased loans and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	8,880,161	9,423,700
Unearned income	(4,281)	(4,160)
Loans, net of unearned income	8,875,880	9,419,540
Non purchased loans and leases | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,321,569	2,360,471
Non purchased loans and leases | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	83,496	80,022
Non purchased loans and leases | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,086,303	827,152
Non purchased loans and leases | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,484,396	2,356,564
Non purchased loans and leases | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,794,898	3,649,629
Non purchased loans and leases | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	109,499	149,862
Non purchased loans and leases | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unearned income	(4,281)	(4,160)
Loans, net of unearned income	8,846,614	9,399,171
Non purchased loans and leases | Accruing Loans | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,315,786	2,356,071
Non purchased loans and leases | Accruing Loans | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	83,485	79,974
Non purchased loans and leases | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,086,303	826,655
Non purchased loans and leases | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,470,640	2,346,658
Non purchased loans and leases | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,785,400	3,644,266
Non purchased loans and leases | Accruing Loans | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	109,281	149,707
Non purchased loans and leases | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unearned income		0
Loans, net of unearned income	29,266	20,369
Non purchased loans and leases | Nonaccruing Loans | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	5,783	4,400
Non purchased loans and leases | Nonaccruing Loans | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	11	48
Non purchased loans and leases | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	497
Non purchased loans and leases | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	13,756	9,906
Non purchased loans and leases | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	9,498	5,363
Non purchased loans and leases | Nonaccruing Loans | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	218	155
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	11,609	17,635
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,708	1,124
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	853	0
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	7,234	13,801
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,049	1,814
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	765	896
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,535	2,204
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	414	164
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,042	1,992
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	44
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	79	4
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	908	3,783
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	395	231
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	507	2,324
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	6	1,037
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	191
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	10,713	10,339
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,534	1,804
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	11	48
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	497
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	6,955	3,049
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,179	4,824
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	34	117
Non purchased loans and leases | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unearned income	(4,281)	(4,160)
Loans, net of unearned income	8,834,097	9,377,753
Non purchased loans and leases | Current Loans | Accruing Loans | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,313,683	2,354,716
Non purchased loans and leases | Current Loans | Accruing Loans | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	83,485	79,974
Non purchased loans and leases | Current Loans | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,085,450	826,655
Non purchased loans and leases | Current Loans | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,462,899	2,330,533
Non purchased loans and leases | Current Loans | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,784,345	3,641,415
Non purchased loans and leases | Current Loans | Accruing Loans | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	108,516	148,620
Non purchased loans and leases | Current Loans | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	17,018	7,826
Non purchased loans and leases | Current Loans | Nonaccruing Loans | Commercial, financial, agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,835	2,432
Non purchased loans and leases | Current Loans | Nonaccruing Loans | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Current Loans | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Current Loans | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	5,759	4,865
Non purchased loans and leases | Current Loans | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	8,319	495
Non purchased loans and leases | Current Loans | Nonaccruing Loans | Installment loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	105	34
Non purchased loans and leases | Residential | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	306,537	243,814
Non purchased loans and leases | Residential | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	306,537	243,317
Non purchased loans and leases | Residential | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	497
Non purchased loans and leases | Residential | 30-89 Days Past Due | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	853	0
Non purchased loans and leases | Residential | 30-89 Days Past Due | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Residential | 90 Days or More Past Due | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Residential | 90 Days or More Past Due | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	497
Non purchased loans and leases | Residential | Current Loans | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	305,684	243,317
Non purchased loans and leases | Residential | Current Loans | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Commercial | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	779,766	583,338
Non purchased loans and leases | Commercial | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	779,766	583,338
Non purchased loans and leases | Commercial | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Commercial | 30-89 Days Past Due | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Commercial | 30-89 Days Past Due | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Commercial | 90 Days or More Past Due | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Commercial | 90 Days or More Past Due | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Commercial | Current Loans | Accruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	779,766	583,338
Non purchased loans and leases | Commercial | Current Loans | Nonaccruing Loans | Real estate – construction:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Primary | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,657,195	1,536,181
Non purchased loans and leases | Primary | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,645,241	1,527,359
Non purchased loans and leases | Primary | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	11,954	8,822
Non purchased loans and leases | Primary | 30-89 Days Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	5,583	11,889
Non purchased loans and leases | Primary | 30-89 Days Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	981	1,865
Non purchased loans and leases | Primary | 90 Days or More Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	452	1,754
Non purchased loans and leases | Primary | 90 Days or More Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	5,951	2,744
Non purchased loans and leases | Primary | Current Loans | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,639,206	1,513,716
Non purchased loans and leases | Primary | Current Loans | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	5,022	4,213
Non purchased loans and leases | Home equity | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	424,860	432,768
Non purchased loans and leases | Home equity | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	424,122	432,214
Non purchased loans and leases | Home equity | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	738	554
Non purchased loans and leases | Home equity | 30-89 Days Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,225	1,152
Non purchased loans and leases | Home equity | 30-89 Days Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	61	66
Non purchased loans and leases | Home equity | 90 Days or More Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	360
Non purchased loans and leases | Home equity | 90 Days or More Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	502	111
Non purchased loans and leases | Home equity | Current Loans | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	422,897	430,702
Non purchased loans and leases | Home equity | Current Loans | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	175	377
Non purchased loans and leases | Rental/investment | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	268,609	264,436
Non purchased loans and leases | Rental/investment | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	267,743	263,937
Non purchased loans and leases | Rental/investment | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	866	499
Non purchased loans and leases | Rental/investment | 30-89 Days Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	301	663
Non purchased loans and leases | Rental/investment | 30-89 Days Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	61
Non purchased loans and leases | Rental/investment | 90 Days or More Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	22	210
Non purchased loans and leases | Rental/investment | 90 Days or More Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	383	194
Non purchased loans and leases | Rental/investment | Current Loans | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	267,420	263,064
Non purchased loans and leases | Rental/investment | Current Loans | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	483	244
Non purchased loans and leases | Land development | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	133,732	123,179
Non purchased loans and leases | Land development | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	106,475	120,125
Non purchased loans and leases | Land development | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	133,534	123,148
Non purchased loans and leases | Land development | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	106,361	120,048
Non purchased loans and leases | Land development | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	198	31
Non purchased loans and leases | Land development | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	114	77
Non purchased loans and leases | Land development | 30-89 Days Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	125	97
Non purchased loans and leases | Land development | 30-89 Days Past Due | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	273	113
Non purchased loans and leases | Land development | 30-89 Days Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Land development | 30-89 Days Past Due | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	44
Non purchased loans and leases | Land development | 90 Days or More Past Due | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	33	0
Non purchased loans and leases | Land development | 90 Days or More Past Due | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	115
Non purchased loans and leases | Land development | 90 Days or More Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	119	0
Non purchased loans and leases | Land development | 90 Days or More Past Due | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	114	29
Non purchased loans and leases | Land development | Current Loans | Accruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	133,376	123,051
Non purchased loans and leases | Land development | Current Loans | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	106,088	119,820
Non purchased loans and leases | Land development | Current Loans | Nonaccruing Loans | Real estate – 1-4 family mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	79	31
Non purchased loans and leases | Land development | Current Loans | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	4
Non purchased loans and leases | Owner-occupied | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,365,288	1,334,765
Non purchased loans and leases | Owner-occupied | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,361,493	1,331,729
Non purchased loans and leases | Owner-occupied | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,795	3,036
Non purchased loans and leases | Owner-occupied | 30-89 Days Past Due | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	609	779
Non purchased loans and leases | Owner-occupied | 30-89 Days Past Due | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Owner-occupied | 90 Days or More Past Due | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2	795
Non purchased loans and leases | Owner-occupied | 90 Days or More Past Due | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,052	2,598
Non purchased loans and leases | Owner-occupied | Current Loans | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,360,882	1,330,155
Non purchased loans and leases | Owner-occupied | Current Loans | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,743	438
Non purchased loans and leases | Non-owner occupied | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,323,135	2,194,739
Non purchased loans and leases | Non-owner occupied | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,317,546	2,192,489
Non purchased loans and leases | Non-owner occupied | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	5,589	2,250
Non purchased loans and leases | Non-owner occupied | 30-89 Days Past Due | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	167	922
Non purchased loans and leases | Non-owner occupied | 30-89 Days Past Due | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	0	0
Non purchased loans and leases | Non-owner occupied | 90 Days or More Past Due | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	4	127
Non purchased loans and leases | Non-owner occupied | 90 Days or More Past Due | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	13	2,197
Non purchased loans and leases | Non-owner occupied | Current Loans | Accruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,317,375	2,191,440
Non purchased loans and leases | Non-owner occupied | Current Loans | Nonaccruing Loans | Real estate – commercial mortgage:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 5,576	$ 53