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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Fixed Maturity Securities [Abstract] |  |
Available-for-sale at fair value (amortized cost of $38,882,168 and $35,281,412) | $ 39,992,346 | $ 38,150,820
Equity Securities, FV-NI | 82,197 | 100,152
Mortgage loans on real estate (net of allowances of $11,286 and $9,384) | 4,966,298 | 4,400,533
Policy loans | 1,344,980 | 1,357,624
Funds withheld at interest | 5,761,471 | 6,083,388
Short-term investments | 142,598 | 93,304
Other invested assets | 1,915,297 | 1,505,332
Total investments | 54,205,187 | 51,691,153
Cash and cash equivalents | 1,889,733 | 1,303,524
Accrued investment income | 427,893 | 392,721
Premiums receivable and other reinsurance balances | 3,017,868 | 2,338,481
Reinsurance ceded receivables | 757,572 | 782,027
Deferred policy acquisition costs | 3,397,770 | 3,239,824
Other assets | 839,222 | 767,088
Total assets | 64,535,245 | 60,514,818
Liabilities and Stockholders’ Equity |  |
Future policy benefits | 25,285,400 | 22,363,241
Interest-sensitive contract liabilities | 18,004,526 | 16,227,642
Other policy claims and benefits | 5,642,755 | 4,992,074
Other reinsurance balances | 487,177 | 488,739
Deferred income taxes | 1,798,800 | 2,198,309
Other liabilities | 1,396,200 | 1,102,975
Long-term debt | 2,787,873 | 2,788,365
Collateral finance and securitization notes | 681,961 | 783,938
Total liabilities | 56,084,692 | 50,945,283
Commitments and contingent liabilities (See Note 12) |  |
Stockholders Equity: |  |
Preferred stock (par value $.01 per share; 10,000,000 shares authorized; no shares issued or outstanding) | 0 | 0
Common stock (par value $.01 per share; 140,000,000 shares authorized; shares issued: 79,137,758 at December 31, 2018 and 2017) | 791 | 791
Additional paid-in-capital | 1,898,652 | 1,870,906
Retained earnings | 7,284,949 | 6,736,265
Treasury stock, at cost - 16,323,390 and 14,685,663 shares | (1,370,602) | (1,102,058)
Accumulated other comprehensive income | 636,763 | 2,063,631
Total stockholders’ equity | 8,450,553 | 9,569,535
Total liabilities and stockholders’ equity | $ 64,535,245 | $ 60,514,818

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