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, 2021	Dec. 31, 2020
Other Assets
Derivatives (included in Other Assets)
Gross amounts recognized	$ 44,022	$ 82,655
Gross amounts offset	(3,607)	(4,336)
Net Amounts Presented in the Consolidated Balance Sheets	40,415	78,319
Gross amounts not offset	0	0
Net Amount	40,415	78,319
Other Liabilities
Derivatives (included in Other Liabilities)
Gross amounts recognized	43,865	82,626
Gross amounts offset	(3,047)	(3,593)
Net amounts presented in the Consolidated Balance Sheets	40,818	79,033
Gross amounts not offset	(43,340)	(77,930)
Net Amount	$ (2,522)	$ 1,103