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Loans and Leases and Allowance for Credit Losses - Activity in Allowance for Loan and Lease Losses (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]      
Individually     $ 19,195
Collectively     2,269,273
Total Financing Receivables $ 1,982,131 $ 1,987,861 2,288,468
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]      
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]      
Individually     16,611
Collectively     1,849,655
Total Financing Receivables 1,801,735   1,866,266
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]      
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]      
Individually     467
Collectively     45,009
Total Financing Receivables 31,761   45,476
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]      
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]      
Individually     1,898
Collectively     369,804
Total Financing Receivables     371,702
Consumer Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]      
Individually     219
Collectively     4,805
Total Financing Receivables $ 4,325   $ 5,024