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CONSOLIDATED BALANCE SHEETS PARENTHETICAL - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Statement of Financial Position [Abstract] |  |
Available for Sale at Fair value - Amortized cost | $ 38,882,168 | $ 35,281,412
Available-for-sale Equity Securities, Amortized Cost Basis | $ 107,721 | $ 102,841
Preferred stock par value | $ 0.01 | $ 0.01
Preferred stock shares authorized | 10,000,000 | 10,000,000
Preferred stock shares issued | 0 | 0
Preferred stock shares outstanding | 0 | 0
Common stock par value | $ 0.01 | $ 0.01
Common stock shares authorized | 140,000,000 | 140,000,000
Common Stock, Shares, Issued | 79,137,758 | 79,137,758
Common stock shares outstanding | 62,814,368 | 64,452,095
Treasury Shares Held | 16,323,390 | 14,685,663
Allowances for Loan and Lease Losses, Real Estate | $ 11,286 | $ 9,384

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- Definition The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82921503&loc=d3e21338-158488 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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