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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Revenues |  |  |
Insurance premiums and contract charges earned | $ 690,938 | $ 670,527 | $ 667,120
Net investment income | 313,610 | 306,003 | 288,311
Net realized investment gains | 22,245 | 27,298 | 37,663
Other income | 4,474 | 6,986 | 5,208
Total revenues | 1,031,267 | 1,010,814 | 998,302
Benefits, losses and expenses |  |  |
Benefits, claims and settlement expenses | 448,317 | 448,250 | 502,434
Interest credited | 169,893 | 163,565 | 154,910
Policy acquisition expenses amortized | 84,643 | 79,519 | 83,398
Operating expenses | 160,112 | 156,058 | 148,635
Interest expense | 14,236 | 14,249 | 14,007
Total benefits, losses and expenses | 877,201 | 861,641 | 903,384
Income before income taxes | 154,066 | 149,173 | 94,918
Income tax expense | 43,173 | 45,307 | 24,412
Net income | 110,893 | 103,866 | 70,506
Net income per share |  |  |
Basic | $ 2.75 | $ 2.63 | $ 1.77
Diluted | $ 2.66 | $ 2.51 | $ 1.70
Weighted average number of shares and equivalent shares |  |  |
Basic | 40,376,562 | 39,513,540 | 39,865,815
Diluted | 41,633,240 | 41,388,368 | 41,436,512
Net realized investment gains |  |  |
Total other-than-temporary impairment losses on securities | (1,532) | 0 | (72)
Portion of losses recognized in other comprehensive income (loss) | 0 | 0 | 0
Net other-than-temporary impairment losses on securities recognized in earnings | (1,532) | 0 | (72)
Realized gains, net | 23,777 | 27,298 | 37,735
Total | $ 22,245 | $ 27,298 | $ 37,663

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- Definition The sum of insurance premiums earned, premiums earned on the income statement for all insurance and reinsurance contracts after subtracting any amounts ceded to another insurer and adding premiums assumed from other insurers, and contract charges earned on investment and universal life-type contracts. + References No definition available. + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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