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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Investments    
Fixed maturities, available for sale, at fair value (amortized cost 2012, $5,311,457; 2011, $4,984,389) $ 5,962,232 $ 5,421,832
Equity securities, available for sale, at fair value (cost 2012, $52,396; 2011, $23,070) 53,503 26,774
Short-term and other investments 276,362 228,902
Total investments 6,292,097 5,677,508
Cash 15,181 7,452
Deferred policy acquisition costs 196,885 216,456
Goodwill 47,396 47,396
Other assets 217,886 212,593
Separate Account (variable annuity) assets 1,398,281 1,273,764
Total assets 8,167,726 7,435,169
Policy liabilities    
Fixed annuity contract liabilities 3,257,758 2,945,107
Interest-sensitive life contract liabilities 761,671 743,384
Unpaid claims and claim expenses 289,395 294,809
Future policy benefits 214,562 208,715
Unearned premiums 213,268 208,963
Total policy liabilities 4,736,654 4,400,978
Other policyholder funds 103,227 114,530
Other liabilities 445,952 352,800
Short-term debt 38,000 38,000
Long-term debt 199,809 199,744
Separate Account (variable annuity) liabilities 1,398,281 1,273,764
Total liabilities 6,921,923 6,379,816
Preferred stock, $0.001 par value, authorized 1,000,000 shares; none issued      
Common stock, $0.001 par value, authorized 75,000,000 shares; issued, 2012, 62,311,787; 2011, 61,803,462 62 62
Additional paid-in capital 383,135 373,384
Retained earnings 921,969 840,644
Accumulated other comprehensive income (loss), net of taxes:    
Net unrealized gains on fixed maturities and equity securities 382,400 268,222
Net funded status of pension and other postretirement benefit obligations (15,311) (16,242)
Treasury stock, at cost, 2012, 22,943,925 shares; 2011, 22,028,030 shares (426,452) (410,717)
Total shareholders' equity 1,245,803 1,055,353
Total liabilities and shareholders' equity $ 8,167,726 $ 7,435,169