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Fair Value of Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2016
Fair Value Disclosures [Abstract] |
Carrying Value and Estimated Fair Value of Financial Instruments | A summary of the carrying value and estimated fair value of our financial instruments at March 31, 2016 and December 31, 2015 is as follows:
| March 31, 2016 |  | December 31, 2015
| Fair Value |  | Carrying Value |  | Fair Value |  | Carrying Value
Assets |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |
Held-to-maturity securities | $ | 667 |  |  | $ | 664 |  |  | $ | 675 |  |  | $ | 672 |
Available-for-sale securities | 2,855,166 |  |  | 2,855,166 |  |  | 2,824,961 |  |  | 2,824,961 |
Trading securities | 13,000 |  |  | 13,000 |  |  | 12,622 |  |  | 12,622 |
Equity securities: |  |  |  |  |  |  |
Available-for-sale securities | 237,816 |  |  | 237,816 |  |  | 236,247 |  |  | 236,247 |
Trading securities | 4,446 |  |  | 4,446 |  |  | 4,353 |  |  | 4,353 |
Mortgage loans | 4,197 |  |  | 3,899 |  |  | 4,237 |  |  | 3,961 |
Policy loans | 5,348 |  |  | 5,348 |  |  | 5,618 |  |  | 5,618 |
Other long-term investments | 51,815 |  |  | 51,815 |  |  | 54,151 |  |  | 54,151 |
Short-term investments | 175 |  |  | 175 |  |  | 175 |  |  | 175 |
Cash and cash equivalents | 143,981 |  |  | 143,981 |  |  | 106,449 |  |  | 106,449 |
Corporate-owned life insurance | 2,160 |  |  | 2,160 |  |  | 1,716 |  |  | 1,716 |
Liabilities |  |  |  |  |  |  |
Policy reserves |  |  |  |  |  |  |
Annuity (accumulations) (1) | $ | 727,595 |  |  | $ | 728,089 |  |  | $ | 707,190 |  |  | $ | 744,931 |
Annuity (benefit payments) | 137,810 |  |  | 94,659 |  |  | 131,899 |  |  | 95,467 |
(1) Annuity accumulations represent deferred annuity contracts that are currently earning interest.
Financial Instruments Measured at Fair Value on Recurring Basis | The following tables present the categorization for our financial instruments measured at fair value on a recurring basis in our Consolidated Balance Sheets at March 31, 2016 and December 31, 2015:
March 31, 2016 |  |  | Fair Value Measurements
Description | Total |  | Level 1 |  | Level 2 |  | Level 3
AVAILABLE-FOR-SALE |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |
Bonds |  |  |  |  |  |  |
U.S. Treasury | $ | 24,083 |  |  | $ | — |  |  | $ | 24,083 |  |  | $ | — |
U.S. government agency | 179,816 |  |  | — |  |  | 179,816 |  |  | — |
States, municipalities and political subdivisions |  |  |  |  |  |  |
General obligations |  |  |  |  |  |  |
Midwest | 166,136 |  |  | — |  |  | 166,136 |  |  | — |
Northeast | 63,927 |  |  | — |  |  | 63,927 |  |  | — |
South | 123,419 |  |  | — |  |  | 123,419 |  |  | — |
West | 110,444 |  |  | — |  |  | 110,444 |  |  | — |
Special revenue |  |  |  |  |  |  |
Midwest | 163,088 |  |  | — |  |  | 162,744 |  |  | 344 |
Northeast | 30,342 |  |  | — |  |  | 30,342 |  |  | — |
South | 166,270 |  |  | — |  |  | 166,270 |  |  | — |
West | 84,656 |  |  | — |  |  | 84,656 |  |  | — |
Foreign bonds | 80,745 |  |  | — |  |  | 80,745 |  |  | — |
Public utilities | 221,920 |  |  | — |  |  | 221,920 |  |  | — |
Corporate bonds |  |  |  |  |  |  |
Energy | 114,682 |  |  | — |  |  | 114,682 |  |  | — |
Industrials | 244,122 |  |  | — |  |  | 244,122 |  |  | — |
Consumer goods and services | 183,784 |  |  | — |  |  | 182,570 |  |  | 1,214 |
Health care | 91,526 |  |  | — |  |  | 91,526 |  |  | — |
Technology, media and telecommunications | 144,537 |  |  | — |  |  | 144,537 |  |  | — |
Financial services | 261,022 |  |  | — |  |  | 251,520 |  |  | 9,502 |
Mortgage-backed securities | 15,799 |  |  | — |  |  | 15,799 |  |  | — |
Collateralized mortgage obligations |  |  |  |  |  |  |
Government national mortgage association | 127,089 |  |  | — |  |  | 127,089 |  |  | — |
Federal home loan mortgage corporation | 139,511 |  |  | — |  |  | 139,511 |  |  | — |
Federal national mortgage association | 113,433 |  |  | — |  |  | 113,433 |  |  | — |
Asset-backed securities | 4,815 |  |  | — |  |  | 3,890 |  |  | 925 |
Total Available-for-Sale Fixed Maturities | $ | 2,855,166 |  |  | $ | — |  |  | $ | 2,843,181 |  |  | $ | 11,985 |
Equity securities: |  |  |  |  |  |  |
Common stocks |  |  |  |  |  |  |
Public utilities | $ | 21,943 |  |  | $ | 21,943 |  |  | $ | — |  |  | $ | — |
Energy | 12,765 |  |  | 12,765 |  |  | — |  |  | — |
Industrials | 45,742 |  |  | 45,742 |  |  | — |  |  | — |
Consumer goods and services | 24,274 |  |  | 24,274 |  |  | — |  |  | — |
Health care | 26,871 |  |  | 26,871 |  |  | — |  |  | — |
Technology, media and telecommunications | 14,424 |  |  | 14,424 |  |  | — |  |  | — |
Financial services | 91,328 |  |  | 87,336 |  |  | — |  |  | 3,992 |
Nonredeemable preferred stocks | 469 |  |  | 469 |  |  | — |  |  | — |
Total Available-for-Sale Equity Securities | $ | 237,816 |  |  | $ | 233,824 |  |  | $ | — |  |  | $ | 3,992 |
Total Available-for-Sale Securities | $ | 3,092,982 |  |  | $ | 233,824 |  |  | $ | 2,843,181 |  |  | $ | 15,977 |
TRADING |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |
Corporate bonds |  |  |  |  |  |  |  |  |  |  |
Industrials | $ | 3,644 |  |  | $ | — |  |  | $ | 3,644 |  |  | $ | — |
Consumer goods and services | 272 |  |  | — |  |  | 272 |  |  | — |
Health care | 1,930 |  |  | — |  |  | 1,930 |  |  | — |
Technology, media and telecommunications | 338 |  |  | — |  |  | 338 |  |  | — |
Financial services | 4,069 |  |  | — |  |  | 4,069 |  |  | — |
Asset-backed securities | — |  |  | — |  |  | — |  |  | — |
Redeemable preferred stocks | 2,747 |  |  | 2,747 |  |  | — |  |  | — |
Equity securities: |  |  |  |  |  |  |
Energy | 293 |  |  | 293 |  |  | — |  |  | — |
Industrials | 1,027 |  |  | 1,027 |  |  | — |  |  | — |
Consumer goods and services | 899 |  |  | 899 |  |  | — |  |  | — |
Health care | 304 |  |  | 304 |  |  | — |  |  | — |
Financial services | 235 |  |  | 235 |  |  | — |  |  | — |
Nonredeemable preferred stocks | 1,688 |  |  | 1,688 |  |  | — |  |  | — |
Total Trading Securities | $ | 17,446 |  |  | $ | 7,193 |  |  | $ | 10,253 |  |  | $ | — |
Short-Term Investments | $ | 175 |  |  | $ | 175 |  |  | $ | — |  |  | $ | — |
Money Market Accounts | $ | 63,567 |  |  | $ | 63,567 |  |  | $ | — |  |  | $ | — |
Corporate-Owned Life Insurance | $ | 2,160 |  |  | $ | — |  |  | $ | 2,160 |  |  | $ | — |
Total Assets Measured at Fair Value | $ | 3,176,330 |  |  | $ | 304,759 |  |  | $ | 2,855,594 |  |  | $ | 15,977 |
December 31, 2015 |  |  | Fair Value Measurements
Description | Total |  | Level 1 |  | Level 2 |  | Level 3
AVAILABLE-FOR-SALE |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |
Bonds |  |  |  |  |  |  |
U.S. Treasury | $ | 21,649 |  |  | $ | — |  |  | $ | 21,649 |  |  | $ | — |
U.S. government agency | 233,030 |  |  | — |  |  | 233,030 |  |  | — |
States, municipalities and political subdivisions |  |  |  |  |  |  |
General obligations |  |  |  |  |  |  |
Midwest | 165,456 |  |  | — |  |  | 165,456 |  |  | — |
Northeast | 58,445 |  |  | — |  |  | 58,445 |  |  | — |
South | 128,789 |  |  | — |  |  | 128,789 |  |  | — |
West | 106,814 |  |  | — |  |  | 106,814 |  |  | — |
Special revenue |  |  |  |  |  |  |
Midwest | 157,706 |  |  | — |  |  | 157,363 |  |  | 343 |
Northeast | 24,599 |  |  | — |  |  | 24,599 |  |  | — |
South | 148,437 |  |  | — |  |  | 148,437 |  |  | — |
West | 82,041 |  |  | — |  |  | 82,041 |  |  | — |
Foreign bonds | 82,528 |  |  | — |  |  | 82,528 |  |  | — |
Public utilities | 215,683 |  |  | — |  |  | 215,683 |  |  | — |
Corporate bonds |  |  |  |  |  |  |
Energy | 113,119 |  |  | — |  |  | 113,119 |  |  | — |
Industrials | 224,255 |  |  | — |  |  | 224,255 |  |  | — |
Consumer goods and services | 174,597 |  |  | — |  |  | 173,364 |  |  | 1,233 |
Health care | 93,509 |  |  | — |  |  | 93,509 |  |  | — |
Technology, media and telecommunications | 142,400 |  |  | — |  |  | 142,400 |  |  | — |
Financial services | 263,485 |  |  | — |  |  | 253,823 |  |  | 9,662 |
Mortgage-backed securities | 16,738 |  |  | — |  |  | 16,738 |  |  | — |
Collateralized mortgage obligations |  |  |  |  |  |  |
Government national mortgage association | 119,626 |  |  | — |  |  | 119,626 |  |  | — |
Federal home loan mortgage corporation | 138,909 |  |  | — |  |  | 138,909 |  |  | — |
Federal national mortgage association | 107,480 |  |  | — |  |  | 107,480 |  |  | — |
Asset-backed securities | 5,666 |  |  | — |  |  | 4,630 |  |  | 1,036 |
Total Available-for-Sale Fixed Maturities | $ | 2,824,961 |  |  | $ | — |  |  | $ | 2,812,687 |  |  | $ | 12,274 |
Equity securities: |  |  |  |  |  |  |
Common stocks |  |  |  |  |  |  |
Public utilities | $ | 19,060 |  |  | $ | 19,060 |  |  | $ | — |  |  | $ | — |
Energy | 11,211 |  |  | 11,211 |  |  | — |  |  | — |
Industrials | 44,810 |  |  | 44,810 |  |  | — |  |  | — |
Consumer goods and services | 23,315 |  |  | 23,315 |  |  | — |  |  | — |
Health care | 28,217 |  |  | 28,217 |  |  | — |  |  | — |
Technology, media and telecommunications | 13,364 |  |  | 13,364 |  |  | — |  |  | — |
Financial services | 95,694 |  |  | 91,588 |  |  | 128 |  |  | 3,978 |
Nonredeemable preferred stocks | 576 |  |  | 576 |  |  | — |  |  | — |
Total Available-for-Sale Equity Securities | $ | 236,247 |  |  | $ | 232,141 |  |  | $ | 128 |  |  | $ | 3,978 |
Total Available-for-Sale Securities | $ | 3,061,208 |  |  | $ | 232,141 |  |  | $ | 2,812,815 |  |  | $ | 16,252 |
TRADING |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |
Bonds |  |  |  |  |  |  |
Corporate bonds |  |  |  |  |  |  |
Industrials | $ | 3,558 |  |  | $ | — |  |  | $ | 3,558 |  |  | $ | — |
Consumer goods and services | 118 |  |  | — |  |  | 118 |  |  | — |
Health care | 2,032 |  |  | — |  |  | 2,032 |  |  | — |
Technology, media and telecommunications | 335 |  |  | — |  |  | 335 |  |  | — |
Financial services | 4,094 |  |  | — |  |  | 4,094 |  |  | — |
Redeemable preferred stocks | 2,485 |  |  | 2,485 |  |  | — |  |  | — |
Equity securities: |  |  |  |  |  |  |
Energy | 267 |  |  | 267 |  |  | — |  |  | — |
Industrials | 986 |  |  | 986 |  |  | — |  |  | — |
Consumer goods and services | 942 |  |  | 942 |  |  | — |  |  | — |
Health care | 304 |  |  | 304 |  |  | — |  |  | — |
Financial services | 229 |  |  | 229 |  |  | — |  |  | — |
Nonredeemable preferred stocks | 1,625 |  |  | 1,625 |  |  | — |  |  | — |
Total Trading Securities | $ | 16,975 |  |  | $ | 6,838 |  |  | $ | 10,137 |  |  | $ | — |
Short-Term Investments | $ | 175 |  |  | $ | 175 |  |  | $ | — |  |  | $ | — |
Money Market Accounts | $ | 20,805 |  |  | $ | 20,805 |  |  | $ | — |  |  | $ | — |
Corporate-Owned Life Insurance | $ | 1,716 |  |  | $ | — |  |  | $ | 1,716 |  |  | $ | — |
Total Assets Measured at Fair Value | $ | 3,100,879 |  |  | $ | 259,959 |  |  | $ | 2,824,668 |  |  | $ | 16,252 |
Changes in Fair Value of Level 3 Securities | The following table provides a summary of the changes in fair value of our Level 3 securities for the three-month period ended March 31, 2016:
| States, municipalities and political subdivisions |  | Corporate bonds |  | Asset-backed securities |  | Equities |  | Total
Balance at January 1, 2016 | $ | 343 |  |  | $ | 10,895 |  |  | $ | 1,036 |  |  | $ | 3,978 |  |  | $ | 16,252 |
Net unrealized gains (losses)(1) | 1 |  |  | 137 |  |  | 35 |  |  | — |  |  | 173 |
Purchases | — |  |  | — |  |  | — |  |  | 132 |  |  | 132 |
Disposals | — |  |  | (316 | ) |  | (146 | ) |  | (118 | ) |  | (580 | )
Balance at March 31, 2016 | $ | 344 |  |  | $ | 10,716 |  |  | $ | 925 |  |  | $ | 3,992 |  |  | $ | 15,977 |
(1) Unrealized gains (losses) are recorded as a component of comprehensive income.

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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