Derivative Instruments - Gains (Losses) of Derivative Instruments (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	$ (15,769)	$ 14,768	$ (4,918)	$ 21,855
Interest Income | Interest Rate Contract
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	836	523	1,206	1,259
Mortgage Banking Income | Interest Rate Lock Commitments
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	(1,082)	2,924	(9,404)	24,745
Mortgage Banking Income | Forward Commitments
Gains (losses) on derivatives financial instruments included in the Consolidated Statements of Income
Gains (losses) on derivative financial instruments	$ (15,523)	$ 11,321	$ 3,280	$ (4,149)