Segment Reporting (Business Segment Profit (Loss)) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net interest income (expense)		$ 167,372	$ 154,730	$ 138,985
Provision for credit losses - loans		(13,311)	8,336	(27,184)
Noninterest income		46,271	46,906	43,176
Noninterest expense		(129,362)	(112,750)	(109,254)
Income (loss) before income taxes		70,970	97,222	45,723
Income tax (expense) benefit		(14,397)	(19,525)	(7,391)
Net income (loss)		56,573	77,697	38,332
Operating Segment [Member] | Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)		171,613	158,967	141,873
Provision for credit losses - loans		(13,311)	8,336	(27,184)
Noninterest income		30,519	31,340	31,232
Noninterest expense		(113,703)	(95,882)	(94,988)
Income (loss) before income taxes		75,118	102,761	50,933
Income tax (expense) benefit		(15,510)	(21,038)	(8,630)
Net income (loss)		59,608	81,723	42,303
Operating Segment [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)	[1]	(4,241)	(4,237)	(2,888)
Noninterest income	[1]	15,752	15,566	11,944
Noninterest expense	[1]	(15,659)	(16,868)	(14,266)
Income (loss) before income taxes	[1]	(4,148)	(5,539)	(5,210)
Income tax (expense) benefit	[1]	1,113	1,513	1,239
Net income (loss)	[1]	$ (3,035)	$ (4,026)	$ (3,971)

[1] Reflects activity from the acquisitions of assets of Landmark since February 1, 2021 (the date of acquisition) and North Woods since August 2, 2021 (date of acquisition).