Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Warrants) (Details) - shares shares in Thousands	Dec. 31, 2013	Jun. 20, 2013	Dec. 31, 2012
Symetra
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investments in unconsolidated affiliates on conversion of warrants	9,490	2,650	9,490

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:	us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration