Derivative Instruments and Hedging Activities - Effect Of Derivatives On Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total cash flow hedges	$ 0	$ (14,285)	$ 0	$ (14,285)
Designated as Hedging Instrument | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total cash flow hedges	2,238	(14,185)	6,668	(11,116)
Interest rate swaps in interest income | Designated as Hedging Instrument | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total cash flow hedges	2,238	2,165	6,668	5,234
Interest rate swaps in interest expense | Designated as Hedging Instrument | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total cash flow hedges	$ 0	$ (16,350)	$ 0	$ (16,350)