Reverse Repurchase Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Reverse Repurchase Agreements [Abstract]
Gross amount of cash collateral received not offset against reverse repurchase agreements in the balance sheet	$ 50,546	$ 215,565
Reverse repurchase agreements	$ 76,416	$ 220,000

Amount of obligation to return cash collateral under master netting arrangements that have not been offset against securities purchased under agreement to resell.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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