Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands | Sep. 30, 2011 | Dec. 31, 2010 |
|---|---|---|
| Consolidated Balance Sheets | ||
| Fixed maturities, amortized cost | $ 5,223,979 | $ 5,256,980 |
| Equity securities, cost | 1,092,662 | 996,088 |
| Senior long-term debt and other debt (estimated fair value) | $ 1,364,000 | $ 1,086,000 |