Derivatives, Hedging Activities and Other Financial Instruments - Notional and Fair Value of Derivatives Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other assets
Derivative [Line Items]
Credit risk derivative asset, fair value	$ 45,289	$ 10,141
Other liabilities
Derivative [Line Items]
Credit risk derivative liability, fair value	$ 45,429	$ 10,708

Fair value of credit risk derivative liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5708775-113959

Name:	us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant