Parent Company Condensed Financial Information (Narrative) (Details)	Dec. 31, 2020
Parent company
Entity Listings [Line Items]
Threshold for parent company financial information disclosure	25.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	dei_EntityListingsLineItems
Namespace Prefix:	dei_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration