Derivative Instruments and Hedging Activities - Cash Flow Hedge Accounting on AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Before tax	$ 4,670	$ 2,786
Interest Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Before tax	13,236	18,776	$ 11,150
Reclassification of gains (losses) included in net income	3,975	2,611	5,159
Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Before tax	(16,873)	(20,500)	(8,025)
Reclassification of gains (losses) included in net income	$ (5,008)	$ (3,673)	$ (3,951)