XML 68 R51.htm IDEA: XBRL DOCUMENT v2.4.1.9
DISCLOSURES REGARDING FAIR VALUES OF FINANCIAL INSTRUMENTS - Securities in Unrealized Loss Position (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Continuous unrealized loss position, fair value [Abstract]    
One year or greater $ 706,839us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue $ 39,030us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Less than one year 1,095,724us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue 2,857,724us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Continuous unrealized loss position, Fair Value, Total 1,802,563us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue 2,896,754us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Continuous unrealized loss position, aggregate loss [Abstract]    
One year or greater 5,320us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses 380us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses
Less than one year 2,055us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses 17,012us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses
Unrealized Losses, Total $ 7,375us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses $ 17,392us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses