Schedule II - Condensed Financial Information, Balance Sheets - Parentheticals (Details) - shares shares in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Balance Sheets
Common stock shares issued	296,145	296,145	296,145
Common stock shares authorized	600,000	600,000	600,000
Parent Company [Member]
Consolidated Balance Sheets
Common stock shares issued	296,000	296,000
Common stock shares authorized	600,000	600,000

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_CommonStockSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant