Annual report pursuant to Section 13 and 15(d)

Statutory Capital Requirements And Dividend Restrictions (Details)

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Statutory Capital Requirements And Dividend Restrictions (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Statutory Capital Requirements And Dividend Restrictions [Abstract]    
Statutory capital and surplus $ 990,300 $ 619,900
Required minimum aggregate statutory capital and surplus $ 617,000 $ 342,000