XML 1055 R63.htm IDEA: XBRL DOCUMENT v2.4.1.9
Proceeds from Sale of Available-for-Sale and Trading Investments (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Fixed-maturity securities      
Available-for-sale:      
Proceeds from sales $ 1,479,188us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember		 $ 2,503,974us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember		 $ 3,156,402us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember
Trading:      
Proceeds from sales   8,306us-gaap_ProceedsFromSaleOfTradingSecuritiesHeldforinvestment
/ us-gaap_InvestmentTypeAxis
= us-gaap_FixedMaturitiesMember		  
Equity securities      
Available-for-sale:      
Proceeds from sales 29,209us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember		 134,400us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember		 348,635us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
Trading:      
Proceeds from sales $ 99,307us-gaap_ProceedsFromSaleOfTradingSecuritiesHeldforinvestment
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember		 $ 46,109us-gaap_ProceedsFromSaleOfTradingSecuritiesHeldforinvestment
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember		 $ 17,180us-gaap_ProceedsFromSaleOfTradingSecuritiesHeldforinvestment
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember