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Investments (Details 11) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Mortgage Loans Property Type Indicators [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer	$ 2,312,167,000	$ 1,003,524,000
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
Apartment [Member]
Mortgage Loans Property Type Indicators [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer	229,266,000	124,674,000
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	9.90%	12.40%
Retail [Member]
Mortgage Loans Property Type Indicators [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer	669,958,000	335,745,000
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	29.00%	33.50%
Office Building [Member]
Mortgage Loans Property Type Indicators [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer	825,406,000	264,584,000
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	35.70%	26.40%
Industrial [Member]
Mortgage Loans Property Type Indicators [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer	455,682,000	200,762,000
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	19.70%	20.00%
Other Commercial [Member]
Mortgage Loans Property Type Indicators [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer	$ 131,855,000	$ 77,759,000
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	5.70%	7.70%

X

- Definition

The balance represents the gross amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

+ References

No definition available.

+ Details

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X

- Definition

The amount represents the total percentage of each property type in comparison to the total of mortgage loans whose balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Details

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