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Deferred Policy Acquisition Costs and Deferred Sales Inducements Deferred Sales Inducements (Tables)
 12 Months Ended
Dec. 31, 2012
Deferred Policy Acquisition Costs and Deferred Sales Inducements [Abstract]  
Deferred Sales Inducements [Table Text Block]
Sales inducements deferred and amortized are as follows:
 
December 31,
 
2012
 
2011
 
2010
 
(Dollars in thousands)
Balance at beginning of year
$
1,242,787

 
$
1,227,328

 
$
1,011,449

Costs deferred during the year
306,659

 
385,123

 
370,714

Amortization
(87,157
)
 
(71,781
)
 
(59,873
)
Effect of net unrealized gains/losses
(169,948
)
 
(297,883
)
 
(94,962
)
Balance at end of year
$
1,292,341

 
$
1,242,787

 
$
1,227,328