Revenue from Contracts with Customers Revenue from Contracts with Customers (Schedule of Deposit Account Charges and Other Fees) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deposit Account Charges and Other Fees [Line Items]
Deposit account charges and other fees	$ 95,983	$ 94,517	$ 90,060
Corporate Cash Management [Member]
Deposit Account Charges and Other Fees [Line Items]
Deposit account charges and other fees	41,442	38,468	36,044
Overdraft and Return Item [Member]
Deposit Account Charges and Other Fees [Line Items]
Deposit account charges and other fees	30,596	31,468	30,576
Other Deposit Account Charges [Member]
Deposit Account Charges and Other Fees [Line Items]
Deposit account charges and other fees	$ 23,945	$ 24,581	$ 23,440