Loan and Lease Financings (Details 3) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Amortized cost of collateral-dependent loans and leases
Allowance for loan and lease losses	$ 166,354	$ 164,898	$ 161,846	$ 163,484	$ 157,470	$ 155,540
Real estate
Amortized cost of collateral-dependent loans and leases
Loans and leases	1,557		1,798
Real estate \| Commercial and agricultural
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
Real estate \| Auto and light truck
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
Real estate \| Medium and heavy duty truck
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
Real estate \| Aircraft
Amortized cost of collateral-dependent loans and leases
Loans and leases	0
Real estate \| Construction equipment
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
Real estate \| Commercial real estate
Amortized cost of collateral-dependent loans and leases
Loans and leases	1,557		1,798
Equipment
Amortized cost of collateral-dependent loans and leases
Loans and leases	55,489		66,285
Equipment \| Commercial and agricultural
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
Equipment \| Auto and light truck
Amortized cost of collateral-dependent loans and leases
Loans and leases	42,900		53,981
Equipment \| Medium and heavy duty truck
Amortized cost of collateral-dependent loans and leases
Loans and leases	1,262		1,507
Equipment \| Aircraft
Amortized cost of collateral-dependent loans and leases
Loans and leases	9,517
Equipment \| Construction equipment
Amortized cost of collateral-dependent loans and leases
Loans and leases	1,810		10,797
Equipment \| Commercial real estate
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
General business assets
Amortized cost of collateral-dependent loans and leases
Loans and leases	4,817		1,136
General business assets \| Commercial and agricultural
Amortized cost of collateral-dependent loans and leases
Loans and leases	4,817		1,136
General business assets \| Auto and light truck
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
General business assets \| Medium and heavy duty truck
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
General business assets \| Aircraft
Amortized cost of collateral-dependent loans and leases
Loans and leases	0
General business assets \| Construction equipment
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
General business assets \| Commercial real estate
Amortized cost of collateral-dependent loans and leases
Loans and leases	0		0
Collateral Pledged
Amortized cost of collateral-dependent loans and leases
Loans and leases	61,863		69,219
Allowance for loan and lease losses	1,597		1,265
Collateral Pledged \| Commercial and agricultural
Amortized cost of collateral-dependent loans and leases
Loans and leases	4,817		1,136
Allowance for loan and lease losses	695		19
Collateral Pledged \| Auto and light truck
Amortized cost of collateral-dependent loans and leases
Loans and leases	42,900		53,981
Allowance for loan and lease losses	521		1,080
Collateral Pledged \| Medium and heavy duty truck
Amortized cost of collateral-dependent loans and leases
Loans and leases	1,262		1,507
Allowance for loan and lease losses	0		166
Collateral Pledged \| Aircraft
Amortized cost of collateral-dependent loans and leases
Loans and leases	9,517
Allowance for loan and lease losses	0
Collateral Pledged \| Construction equipment
Amortized cost of collateral-dependent loans and leases
Loans and leases	1,810		10,797
Allowance for loan and lease losses	285		0
Collateral Pledged \| Commercial real estate
Amortized cost of collateral-dependent loans and leases
Loans and leases	1,557		1,798
Allowance for loan and lease losses	$ 96		$ 0