|
Reserve for Losses and Loss Adjustment Expenses (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
|
| Summary of reserve for losses and loss adjustment expenses | ||||
| Minimum Period For Claims Resolution | 5 years | |||
| Net losses: | ||||
| Favorable development of reserves established in prior years, net | $ 38.5 | $ 60.1 | $ 91.6 | $ 107.5 |
| Liability For Future Policy Benefits Period Expense Accident Years | 2006 through 2011 | 2005 through 2011 | 2004 through 2009 | |