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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Summary of Significant Accounting Policies [Abstract]  
Deferred policy acquisition costs asset by segment
                         
    December 31,
   

    2012    

      

    2011    
            As Adjusted
       

Annuity

     $     125,437           $     139,316  

Life

       46,798             54,234  

Property and casualty

       24,650             22,906  
     

 

 

          

 

 

  

Total

     $ 196,885           $ 216,456  
     

 

 

          

 

 

  
Adjustment to amortization expenses
                               
    Year Ended December 31,
   

    2012    

  

    2011    

  

    2010    
        As Adjusted   As Adjusted

Increase (decrease) to amortization:

                              

Annuity

     $     (3,836 )     $     2,466       $     (2,042 )

Life

       751         1,159         353  
     

 

 

      

 

 

      

 

 

  

Total

     $ (3,085 )     $ 3,625       $ (1,689 )
     

 

 

      

 

 

      

 

 

  
Allocation of goodwill by reporting unit

The allocation of goodwill by reporting unit is as follows:

 

         

Annuity

   $ 28,025  

Life

     9,911  

Property and casualty

     9,460  
   

 

 

  

Total

   $ 47,396  
   

 

 

  
Property and Equipment
                     
    December 31,  
    2012         2011  

Property and equipment

   $ 108,502         $ 112,438  

Less: accumulated depreciation

     71,508           72,738  
   

 

 

        

 

 

  

Total

   $ 36,994         $ 39,700  
   

 

 

        

 

 

  
Summary of guaranteed minimum death benefit
                     
    December 31,  
   

  2012  

        

  2011  

  

GMDB reserve

   $ 392         $ 583  

Aggregate in-the-money death benefits under the GMDB provision

     41,990           53,670  

Variable annuity contract value distribution based on GMDB feature:

                    

No guarantee

     31 %          30 % 

Return of premium guarantee

     63 %          64 % 

Guarantee of premium roll-up at an annual rate of 3% or 5%

     6 %          6 % 
   

 

 

        

 

 

  

Total

     100 %          100 % 
   

 

 

        

 

 

  
Stock options fair value pricing model weighted-average assumptions
                         
    Year Ended December 31,  
   

    2012    

    

    2011    

    

    2010    

  

Number of options granted

     296,188       313,000       361,456  

Weighted average grant date fair value of options granted

   $ 6.02     $ 6.20     $ 5.80  

Weighted average assumptions:

                        

Risk-free interest rate

     1.0 %      2.2 %      2.7 % 

Expected dividend yield

     2.2 %      2.2 %      2.2 % 

Expected life, in years

     5.8       5.8       5.9  

Expected volatility (based on historical volatility)

     45.1 %      45.0 %      51.5 % 
Computations of net income per share on both basic and diluted bases, including reconciliations of the numerators and denominators
                         
    Year Ended December 31,  
    2012     2011     2010  
          As Adjusted     As Adjusted  

Basic - assumes no dilution:

                        

Net income for the period

   $ 103,866     $ 70,506     $ 80,131  
   

 

 

    

 

 

    

 

 

  

Weighted average number of common shares outstanding during the period (in thousands)

     39,514       39,866       39,350  
   

 

 

    

 

 

    

 

 

  

Net income per share – basic

   $ 2.63     $ 1.77     $ 2.04  
   

 

 

    

 

 

    

 

 

  
       

Diluted - assumes full dilution:

                        

Net income for the period

   $ 103,866     $ 70,506     $ 80,131  
   

 

 

    

 

 

    

 

 

  

Weighted average number of common shares outstanding during the period (in thousands)

     39,514       39,866       39,350  

Weighted average number of common equivalent shares to reflect the dilutive effect of common stock equivalent securities (in thousands):

                        

Stock options

     222       206       255  

Common stock units related to deferred compensation for Directors

     112       114       107  

Common stock units related to deferred compensation for Employees

     116       115       195  

Restricted common stock units related to incentive compensation

     1,424       1,136       1,106  
   

 

 

    

 

 

    

 

 

  

Total common and common equivalent shares adjusted to calculate diluted earnings per share (in thousands)

     41,388       41,437       41,013  
   

 

 

    

 

 

    

 

 

  

Net income per share – diluted

   $ 2.51     $ 1.70     $ 1.95  
   

 

 

    

 

 

    

 

 

  
Components of comprehensive income
                         
    Year Ended December 31,  
    2012     2011     2010  
          As Adjusted     As Adjusted  
       

Net income

   $ 103,866     $ 70,506     $ 80,131  
   

 

 

    

 

 

    

 

 

  

Other comprehensive income (loss):

                        

Change in net unrealized gains and losses on fixed maturities and equity securities

                        

Net unrealized holding gains and losses on fixed maturities and equity securities arising during the period

     204,460       281,202       153,743  

Less: reclassification adjustment for net gains included in income before income tax

     27,298       37,663       21,576  
   

 

 

    

 

 

    

 

 

  

Total, before tax expense

     177,162       243,539       132,167  

Income tax expense

     62,984       86,585       46,967  
   

 

 

    

 

 

    

 

 

  

Total, net of tax

     114,178       156,954       85,200  
   

 

 

    

 

 

    

 

 

  

Change in net funded status of pension and other postretirement benefit obligations

                        

Before tax

     1,276       (4,801 )      (2,464 ) 

Income tax expense (benefit)

     345       (1,714 )      (852 ) 
   

 

 

    

 

 

    

 

 

  

Total, net of tax

     931       (3,087 )      (1,612 ) 
   

 

 

    

 

 

    

 

 

  

Total comprehensive income

   $ 218,975     $ 224,373     $ 163,719  
   

 

 

    

 

 

    

 

 

  
Summary of revised financial statements
                                                 
    As of December 31, 2011     As of December 31, 2010  
    As
Originally
Reported		     As
Adjusted		     Effect of
Change		     As
Originally
Reported		     As
Adjusted		     Effect of
Change		  

Deferred policy acquisition costs

   $ 265,041     $ 216,456     $ (48,585)     $ 272,825     $ 222,177     $ (50,648)  

Total assets

     7,483,737       7,435,169       (48,568)       6,996,300       6,945,662       (50,638)  

Other liabilities

     369,800       352,800       (17,000)       304,977       287,252       (17,725)  

Total liabilities

     6,396,811       6,379,816       (16,995)       6,116,293       6,098,575       (17,718)  

Retained earnings

     875,069       840,644       (34,425)       823,579       789,128       (34,451)  

Net unrealized gains and losses on fixed maturities and equity securities

     265,370       268,222       2,852       109,737       111,268       1,531  

Total shareholders’ equity

     1,086,926       1,055,353       (31,573)       880,007       847,087       (32,920)  
     
    Year ended December 31, 2011     Year ended December 31, 2010  
    As
Originally
Reported		     As
Adjusted		     Effect of
Change		     As
Originally
Reported		     As
Adjusted		     Effect of
Change		  

Total revenues

   $ 998,300     $ 998,302     $ 2     $ 974,711     $ 974,714     $ 3  

Policy acquisition expenses amortized

     92,128       83,398       (8,730)       85,056       77,347       (7,709)  

Operating expenses

     139,936       148,635       8,699       142,852       151,690       8,838  

Total benefits, losses and expenses

     903,422       903,384       (38)       863,420       864,546       1,126  

Income before income taxes

     94,878       94,918       40       111,291       110,168       (1,123)  

Income tax expense

     24,398       24,412       14       30,429       30,037       (392)  

Net income

     70,480       70,506       26       80,862       80,131       (731)