Noninterest Income - Lending Related Fees (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lending related fees	$ 13,125	$ 13,937
Unused commitment fees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lending related fees	8,406	9,670
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lending related fees	$ 4,719	$ 4,267