Business Combinations (Details Textual) $ / shares in Units, $ in Thousands				6 Months Ended	12 Months Ended
	Mar. 23, 2022 Branch	Nov. 01, 2021 USD ($) $ / shares shares	Oct. 31, 2021 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Business Acquisition [Line Items]
Total assets				$ 4,114,364	$ 4,142,749
Deposits				3,625,538	3,547,235
Equity				321,449	472,432	$ 393,886	$ 366,908	$ 347,355	$ 350,097
Goodwill				94,240	94,240
Common Stock
Business Acquisition [Line Items]
Equity				304,707	306,123	$ 304,670	$ 208,312	$ 208,199	$ 208,763
Emclaire Financial
Business Acquisition [Line Items]
Business acquisition, date of merger agreement	Mar. 23, 2022
Number of operating branches | Branch	19
Total assets				1,000,000
Gross loans				810,700
Deposits				937,600
Equity				80,200
Cortland Bank
Business Acquisition [Line Items]
Business acquisition, date of merger agreement		Nov. 01, 2021
Cash consideration per share | $ / shares | $ / shares			$ 17.82
Maximum percentage of common shares exchanged for company's shares under merger agreement		75.00%
Percentage of common shares exchanged for company's cash under merger agreement		25.00%
Value of stock issued for acquisition		$ 29,618
Fair value of total consideration transferred		128,539	$ 128,500
Merger related costs				$ 2,600	$ 7,100
Goodwill		$ 48,465
Cortland Bank | Common Stock
Business Acquisition [Line Items]
Cash consideration per share | $ / shares | $ / shares		$ 28.00
Shares of stock issued for acquisition | shares		1.75	5,600,000
Value of stock issued for acquisition			$ 29,600