Other Non-interest Income and Non-interest Expense - Summary of Other Expense (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Consumer credit services		$ 4,266	$ 2,413	$ 11,798	$ 10,082
Other		11,341	11,854	30,575	28,596
Other non-interest expense	[1]	$ 15,607	$ 14,267	$ 42,373	$ 38,678

[1] Prior period amounts have been reclassified to conform to the current period presentation. See “Notes to Condensed Consolidated Financial Statements – Note 1. Summary of Significant Accounting Policies” for additional information.