Derivatives - Gains/(Losses) on Derivatives Associated with Cash Flow Hedges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) expected to be reclassified to earnings in the next twelve months	$ 1,000
Cash Flow Hedges | Hedging Instruments And Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Losses)	11,234	$ (6,284)
Gains/(Losses)			$ (2,156)
Gain/(loss) reclassified from AOCI into Interest income	4,105	2,142
Gain/(loss) reclassified from AOCI into Interest income			(2,945)
Cash Flow Hedges | Hedging Instruments And Hedged Items | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Losses)	$ 20,625	$ (5,502)
Gains/(Losses)			$ (8,264)