Derivatives - Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Derivatives, Fair Value [Line Items]
Net tax expenses (benefits) recognized on net change in unrealized gain (loss) on hedging activities	$ 145	$ 38	$ 517	$ 173
Amount of gain recognized in other comprehensive loss, net of tax expense of $145, $38, $517 and $173	409	106	1,466	489
Not designated as hedging
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(9,290)	(6,274)	13,942	(10,715)
Not designated as hedging | Interest rate-lock commitments
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(3,980)	(3,316)	(7,419)	(24,587)
Not designated as hedging | Forward commitments
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	4,795	(806)	57,130	23,252
Not designated as hedging | Futures contracts
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(10,105)	(2,152)	(35,805)	(9,380)
Not designated as hedging | Option contracts
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	0	0	36	0
Designated as hedging
Derivatives, Fair Value [Line Items]
Amount of gain recognized in other comprehensive loss, net of tax expense of $145, $38, $517 and $173	$ 409	$ 106	$ 1,466	$ 489