Allowance for Credit Losses (Narrative) (Details) $ in Thousands	3 Months Ended						6 Months Ended
	Jun. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2021	Jun. 30, 2021 USD ($) risk_code	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) risk_code	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Length of time projected by model							10 years
Interest Income on Non-Accrual Loans and Leases | $					$ 0	$ 0	$ 0	$ 0
Days Past Due on Leases and Equipment Finance							181 days
Loans Deferred Under CARES Act | $					167,300		$ 167,300		$ 355,500
GNMA repurchased loans on deferral | $					150,600		150,600		177,700
Total troubled debt restructurings, net of deferred fees and costs | $					$ 13,100		$ 13,100		$ 15,000
Minimum Collateral Value compared to Secured Loan (Percent)					100.00%		100.00%
May Consensus
Financing Receivable, Allowance for Credit Loss [Line Items]
Real GDP Growth					7.40%
Unemployment Rate					5.50%
Moody's Analytics May S2 scenario
Financing Receivable, Allowance for Credit Loss [Line Items]
Real GDP Growth					5.70%
Unemployment Rate					6.30%
Probability economy performs better than scenario					75.00%
Probability economy performs worse than scenario					25.00%
Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Threshold Period Past Due					90 days		90 days
Pass | Non homogeneous | Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					1		1
Pass | Non homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					9		9
Watch | Non homogeneous | Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					10		10
Watch | Non homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					11		11
Special mention | Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					12		12
Substandard | Non homogeneous | Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					13		13
Substandard | Non homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					14		14
Doubtful | Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					15		15
Loss | Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					16		16
Loss | Non homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)					16		16
Expected | May Consensus
Financing Receivable, Allowance for Credit Loss [Line Items]
Unemployment Rate				5.00%
Expected | Moody's Analytics May S2 scenario
Financing Receivable, Allowance for Credit Loss [Line Items]
Unemployment Rate			5.00%
Fed Funds Rate	0.00%
Expected | Minimum | May Consensus
Financing Receivable, Allowance for Credit Loss [Line Items]
Fed Funds Rate		0.00%
Expected | Maximum | May Consensus
Financing Receivable, Allowance for Credit Loss [Line Items]
Fed Funds Rate		0.25%