Allowance for Credit Losses (Note Restructurings During Period) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) loans	Sep. 30, 2020 USD ($) loans	Sep. 30, 2021 USD ($) loans	Sep. 30, 2020 USD ($) loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	116	145	387	462
Recorded investment at period end | $	$ 21,919	$ 25,078	$ 67,710	$ 76,497
Interest only period provided
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	7	6	17	23
Recorded investment at period end | $	$ 9,639	$ 5,703	$ 19,728	$ 24,847
Loan term extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	41	29	112	62
Recorded investment at period end | $	$ 6,371	$ 2,380	$ 14,500	$ 5,885
Below market interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	47	55	148	212
Recorded investment at period end | $	$ 3,126	$ 15,341	$ 21,004	$ 38,740
Discharged from bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loans	21	55	110	165
Recorded investment at period end | $	$ 2,783	$ 1,654	$ 12,478	$ 7,025