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Investment Securities - Textual (Details) - USD ($)	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Allowance for credit losses on loans	$ 51,562,000	$ 64,225,000	$ 70,185,000	$ 71,501,000	$ 47,540,000	$ 37,993,000	$ 36,171,000
Accrued Investment Income Receivable	4,200,000		3,600,000
Available-for-sale Securities [Member]
Allowance for credit losses on loans	$ 0		$ 0

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Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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