Variable Interest Entities - Summary of the Impact of Qualifying LIHTC Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Low income housing tax credits
Variable Interest Entity [Line Items]
Amortization of qualifying LIHTC investments	$ 8,273	$ 4,436	$ 19,586	$ 12,721
Affordable Housing Tax Credits And Other Tax Benefits	(6,738)	(3,607)	(16,094)	(10,758)
Other tax benefits related to qualifying LIHTC investments
Variable Interest Entity [Line Items]
Affordable Housing Tax Credits And Other Tax Benefits	$ (3,034)	$ (1,751)	$ (8,172)	$ (4,970)