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Investments (Unrealized Gains on Investments) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Net unrealized gains $ 79,237 $ 188,197 $ 149,612
Deferred income tax expense (27,733) (65,869) (52,364)
Net unrealized gains, net of deferred income tax 51,504 122,328 97,248
(Decrease) increase in net unrealized gains in OCI, net of deferred income tax (70,824) 25,080 43,380
AFS Fixed Maturity Securities [Member]
     
Net unrealized gains 39,559 165,330 130,517
Equity Securities [Member]
     
Net unrealized gains 37,421 18,941 13,529
Available-for-sale Securities [Member]
     
Net unrealized gains 76,980 184,271 144,046
Held To Maturity Fixed Maturity Securities [Member]
     
Net unrealized gains 2,257 3,926 5,566
Total HTM Securities [Member]
     
Net unrealized gains $ 2,257 $ 3,926 $ 5,566