Derivative and Hedging Activities Derivative Impact on Perfomance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Other Liabilities [Member]
Derivative Instruments
Derivatives (trading and other liabilities), fair value	$ 36,494		$ 36,494		$ 43,716
Derivatives (trading liabilities)	10,039		10,039		16,155
Other Liabilities [Member]
Derivative Instruments
Derivatives (trading and other liabilities), fair value	36,494		36,494
Derivatives (trading liabilities)	36,494		36,494
Other Liabilities [Member] | Fair Value, Inputs, Level 2
Derivative Instruments
Derivatives (trading and other liabilities), fair value	36,065		36,065		41,671
Derivatives (trading liabilities)	36,065		36,065		$ 41,671
Capital markets, net | Interest rate-related instruments — customer and mirror, net
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(950)	$ (65)	1,989	$ (3,155)
Capital markets, net | Foreign currency exchange forwards
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(25)	41	118	(81)
Capital markets, net | Commodity contracts
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(512)	(105)	(1,132)	641
Mortgage banking, net | Interest rate lock commitments (mortgage)
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(373)	382	(3,081)	10,310
Mortgage banking, net | Forward commitments (mortgage)
Derivative Instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 4,685	$ 9,679	$ (1,616)	$ (582)