Other Non-interest Income and Non-interest Expense - Summary of Other Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Income and Expenses [Abstract]
Referral revenue		$ 2,762	$ 625	$ 5,356	$ 2,239
Realized gains (losses) on sales of securities available for sale and other investments		148	(2)	(96)	(1)
Other		3,831	1,917	7,088	4,813
Other non-interest income	[1]	$ 6,741	$ 2,540	$ 12,348	$ 7,051

[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.