Segment Reporting - Schedule of Segment Reporting (Details)	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Reportable business segments | segment	3
Segment Reporting Information [Line Items]
Total assets	$ 6,416,665,000	$ 5,464,768,000	$ 6,336,496,000
Interest income	51,457,000	52,019,000
Interest expense	6,043,000	9,551,000
Net interest income	45,414,000	42,468,000
Reversal of provision for credit losses	(11,283,000)	21,843,000
Noninterest income	23,250,000	18,384,000
Noninterest Expense	39,540,000	38,777,000
Intersegment (revenues) expense	0	0
Income before income taxes	40,407,000	232,000
Income tax expense (benefit)	7,804,000	(606,000)
Net income	32,603,000	838,000
Net capital expenditures	1,187,000	379,000
Banking1
Segment Reporting Information [Line Items]
Total assets	6,313,000,000	5,362,279,000	6,234,336,000
Interest income	51,449,000	52,004,000
Interest expense	3,750,000	8,276,000
Net interest income	47,699,000	43,728,000
Reversal of provision for credit losses	(11,283,000)	21,843,000
Noninterest income	11,230,000	7,552,000
Noninterest Expense	30,496,000	31,247,000
Intersegment (revenues) expense	(323,000)	(282,000)
Income before income taxes	40,039,000	(1,528,000)
Income tax expense (benefit)	8,271,000	(844,000)
Net income	31,768,000	(684,000)
Net capital expenditures	1,111,000	371,000
Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	48,124,000	45,786,000	48,646,000
Interest income	0	7,000
Interest expense	0	0
Net interest income	0	7,000
Reversal of provision for credit losses	0	0
Noninterest income	6,773,000	6,187,000
Noninterest Expense	4,191,000	4,178,000
Intersegment (revenues) expense	164,000	152,000
Income before income taxes	2,418,000	1,864,000
Income tax expense (benefit)	498,000	382,000
Net income	1,920,000	1,482,000
Net capital expenditures	5,000	5,000
Insurance [Member]
Segment Reporting Information [Line Items]
Total assets	37,075,000	35,935,000	35,906,000
Interest income	0	0
Interest expense	0	0
Net interest income	0	0
Reversal of provision for credit losses	0	0
Noninterest income	5,105,000	4,887,000
Noninterest Expense	3,304,000	3,196,000
Intersegment (revenues) expense	159,000	130,000
Income before income taxes	1,641,000	1,561,000
Income tax expense (benefit)	351,000	336,000
Net income	1,290,000	1,225,000
Net capital expenditures	9,000	3,000
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	18,466,000	20,768,000	$ 17,608,000
Interest income	8,000	8,000
Interest expense	2,293,000	1,275,000
Net interest income	(2,285,000)	(1,267,000)
Reversal of provision for credit losses	0	0
Noninterest income	142,000	(242,000)
Noninterest Expense	1,549,000	156,000
Intersegment (revenues) expense	0	0
Income before income taxes	(3,692,000)	(1,665,000)
Income tax expense (benefit)	(1,316,000)	(480,000)
Net income	(2,376,000)	(1,185,000)
Net capital expenditures	$ 62,000	$ 0