Basis of Presentation and Significant Accounting Policies Accrued Interest Receivable (Details)	Dec. 31, 2019
Basis of Presentation and Significant Accounting Policies [Abstract]
Number of days within which accrued interest receivables are generally received in cash	30 days

Threshold period for when accounts receivable, classified as noncurrent, is considered past due, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes threshold period past due to write off as uncollectible.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447

Name:	us-gaap_AccountsReceivableNoncurrentThresholdPeriodPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant