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Organization - Narrative (Details) $ in Thousands	3 Months Ended
Organization - Narrative (Details) $ in Thousands	Mar. 31, 2022 USD ($) bank_branch	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Business Acquisition [Line Items]
Retained earnings \| $	$ 1,136,478	$ 1,016,350
Allowance for credit losses \| $	$ 272,469	$ 273,635	$ 383,016	$ 433,752
CALIFORNIA
Business Acquisition [Line Items]
Retail branch locations	69
NORTH CAROLINA
Business Acquisition [Line Items]
Retail branch locations	1
COLORADO
Business Acquisition [Line Items]
Retail branch locations	1

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

The cumulative amount of the reporting entity's undistributed earnings or deficit.