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Deferred Policy Acquisition Costs (Tables)
 3 Months Ended
Mar. 31, 2014
Deferred Policy Acquisition Costs Disclosures [Abstract]  
Deferred Policy Acquisition Costs
The balances of and changes in deferred policy acquisition costs (“DAC”) as of and for the periods ended March 31, 2014 and 2013 are as follows:

Deferred Policy Acquisition Costs:
Three Months Ended
($ in millions)
March 31,
 
2014
 
2013
 
 
 
 
Balance, beginning of period
$
462.3

 
$
426.2

Policy acquisition costs deferred
16.9

 
17.2

Costs amortized to expenses:
 
 
 
Recurring costs
(26.8
)
 
(16.7
)
Realized investment gains (losses)
10.5

 
2.7

Offsets to net unrealized investment gains or losses included in AOCI
(16.7
)
 
4.2

Balance, end of period
$
446.2

 
$
433.6