Derivative Instruments and Hedging Activities - Schedule of Gross Amounts of Derivative Assets and Derivative Liabilities (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Other Assets
Derivatives (included in Other Assets)
Gross amounts recognized		$ 90,723	$ 26,146
Gross amounts offset		(2,588)	(499)
Net Amounts Presented in the Consolidated Balance Sheets		88,135	25,647
Gross amounts not offset	[1]	0	0
Net Amount		88,135	25,647
Other Liabilities
Derivatives (included in Other Liabilities)
Gross amounts recognized		90,577	26,114
Gross amounts offset		(2,588)	(499)
Net Amounts Presented in the Consolidated Balance Sheets		87,989	25,615
Gross amounts not offset	[1]	(86,720)	(26,127)
Net Amount		$ 1,269	$ (512)

[1] Amounts represent collateral posted for the periods presented.