Loans Held for Sale, Loans and Allowance for Credit Losses - Summary of Loan that were Modified Into TDRs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) TDR	Mar. 31, 2019 USD ($) TDR
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	7	1
Amortized Cost | $	$ 65,691	$ 24,369
Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	7	1
Amortized Cost | $	$ 65,691	$ 24,369