XML 61 R5.htm IDEA: XBRL DOCUMENT v2.4.1.9
Condensed Consolidated Statements of Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Statement [Abstract]    
Earned premiums, ceded to affiliates $ 105.4stfc_PremiumsEarnedNetPropertyAndCasualtyToAffiliates $ 47.1stfc_PremiumsEarnedNetPropertyAndCasualtyToAffiliates
Net investment income, from affiliate 1.2stfc_NetInvestmentIncomeFromAffiliates 1.2stfc_NetInvestmentIncomeFromAffiliates
Losses and loss expenses, ceded to affiliates 74.1stfc_IncurredClaimPropertyCasualtyAndLiabilityToAffiliates 30.4stfc_IncurredClaimPropertyCasualtyAndLiabilityToAffiliates
Net Acquisition and Operating Expenses 77.3stfc_NetAcquisitionandOperatingExpenses 38.9stfc_NetAcquisitionandOperatingExpenses
Interest expense, affiliates $ 0.2stfc_InterestExpenseDebtToAffiliates $ 0.2stfc_InterestExpenseDebtToAffiliates