Investments (Details 9) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
High Investment Grade Member
Credit Quality Indicators [Line Items]
Loans Receivable Commercial Real Estate	$ 193,151	$ 205,127
Investment Grade Member
Credit Quality Indicators [Line Items]
Loans Receivable Commercial Real Estate	535,654	585,818
Average Member
Credit Quality Indicators [Line Items]
Loans Receivable Commercial Real Estate	94,357	38,152
Watch List Member
Credit Quality Indicators [Line Items]
Loans Receivable Commercial Real Estate	75,259	44,208
In Or Near Default Member
Credit Quality Indicators [Line Items]
Loans Receivable Commercial Real Estate	$ 17,319	$ 18,745

Reflects the sum of the gross carrying amounts of unpaid loans issued to businesses to acquire, develop, construct, improve, or refinance land or a building. Includes [but is not limited to] commercial mortgage loans, which are secured by a [legal] security interest in real property [commercial building or business real property] which thereby serves as collateral securing repayment of the loan; and construction financing, which is an obligation generally in the form of a [promissory] note, used for the funding of construction projects.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Chapter 8
-Paragraph 51, 52, 53
-IssueDate 2006-05-01

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 01-6
-Paragraph 13
-Subparagraph e

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 60
-Paragraph 47

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 7
-Subparagraph a
-Article 9

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant