Segment Reporting - Schedule of Segment Reporting (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Reportable business segments | segment			3
Segment Reporting Information [Line Items]
Total assets	$ 6,356,305,000	$ 6,125,312,000	$ 6,356,305,000	$ 6,125,312,000	$ 6,336,496,000
Interest income	52,441,000	49,980,000	103,898,000	101,999,000
Interest expense	5,684,000	6,462,000	11,727,000	16,013,000
Net interest income	46,757,000	43,518,000	92,171,000	85,986,000
Reversal of provision for credit losses	(59,000)	23,737,000	(11,342,000)	45,580,000
Noninterest income	20,230,000	18,000,000	43,480,000	36,384,000
Noninterest Expense	41,286,000	35,960,000	80,826,000	74,737,000
Intersegment (revenues) expense	0	0	0	0
Income before income taxes	25,760,000	1,821,000	66,167,000	2,053,000
Income tax expense (benefit)	4,885,000	(264,000)	12,689,000	(870,000)
Net income	20,875,000	2,085,000	53,478,000	2,923,000
Net capital expenditures	1,599,000	1,301,000	2,786,000	1,680,000
Banking1
Segment Reporting Information [Line Items]
Total assets	6,249,195,000	6,024,054,000	6,249,195,000	6,024,054,000	6,234,336,000
Interest income	52,432,000	49,971,000	103,881,000	101,975,000
Interest expense	3,483,000	5,256,000	7,233,000	13,532,000
Net interest income	48,949,000	44,715,000	96,648,000	88,443,000
Reversal of provision for credit losses	(59,000)	23,737,000	(11,342,000)	45,580,000
Noninterest income	9,433,000	8,284,000	20,663,000	15,836,000
Noninterest Expense	33,103,000	28,546,000	63,599,000	59,793,000
Intersegment (revenues) expense	(323,000)	(274,000)	(646,000)	(556,000)
Income before income taxes	25,661,000	990,000	65,700,000	(538,000)
Income tax expense (benefit)	4,905,000	(578,000)	13,176,000	(1,422,000)
Net income	20,756,000	1,568,000	52,524,000	884,000
Net capital expenditures	1,579,000	1,274,000	2,690,000	1,645,000
Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	49,822,000	46,141,000	49,822,000	46,141,000	48,646,000
Interest income	1,000	0	1,000	7,000
Interest expense	0	0	0	0
Net interest income	1,000	0	1,000	7,000
Reversal of provision for credit losses	0	0	0	0
Noninterest income	6,756,000	5,504,000	13,529,000	11,691,000
Noninterest Expense	4,386,000	3,729,000	8,577,000	7,907,000
Intersegment (revenues) expense	164,000	146,000	328,000	298,000
Income before income taxes	2,207,000	1,629,000	4,625,000	3,493,000
Income tax expense (benefit)	459,000	331,000	957,000	713,000
Net income	1,748,000	1,298,000	3,668,000	2,780,000
Net capital expenditures	7,000	1,000	12,000	6,000
Insurance [Member]
Segment Reporting Information [Line Items]
Total assets	37,929,000	34,574,000	37,929,000	34,574,000	35,906,000
Interest income	0	0	0	0
Interest expense	0	0	0	0
Net interest income	0	0	0	0
Reversal of provision for credit losses	0	0	0	0
Noninterest income	3,990,000	4,209,000	9,095,000	9,096,000
Noninterest Expense	3,150,000	2,925,000	6,454,000	6,121,000
Intersegment (revenues) expense	159,000	128,000	318,000	258,000
Income before income taxes	681,000	1,156,000	2,323,000	2,717,000
Income tax expense (benefit)	139,000	242,000	490,000	577,000
Net income	542,000	914,000	1,833,000	2,140,000
Net capital expenditures	4,000	6,000	13,000	9,000
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	19,359,000	20,543,000	19,359,000	20,543,000	$ 17,608,000
Interest income	8,000	9,000	16,000	17,000
Interest expense	2,201,000	1,206,000	4,494,000	2,481,000
Net interest income	(2,193,000)	(1,197,000)	(4,478,000)	(2,464,000)
Reversal of provision for credit losses	0	0	0	0
Noninterest income	51,000	3,000	193,000	(239,000)
Noninterest Expense	647,000	760,000	2,196,000	916,000
Intersegment (revenues) expense	0	0	0	0
Income before income taxes	(2,789,000)	(1,954,000)	(6,481,000)	(3,619,000)
Income tax expense (benefit)	(618,000)	(259,000)	(1,934,000)	(738,000)
Net income	(2,171,000)	(1,695,000)	(4,547,000)	(2,881,000)
Net capital expenditures	$ 9,000	$ 20,000	$ 71,000	$ 20,000