Variable Interest Entities - Summary of the Impact of Qualifying LIHTC Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Low income housing tax credits
Variable Interest Entity [Line Items]
Amortization of qualifying LIHTC investments	$ 5,752	$ 4,287	$ 11,313	$ 8,285
Affordable Housing Tax Credits And Other Tax Benefits	(4,758)	(3,522)	(9,356)	(7,151)
Other tax benefits related to qualifying LIHTC investments
Variable Interest Entity [Line Items]
Affordable Housing Tax Credits And Other Tax Benefits	$ (2,583)	$ (1,609)	$ (5,138)	$ (3,219)