Fair Value of Financial Instruments (Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 20,003	$ 20,034
Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,217,610	3,168,542
U.S. Treasury | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	21,981	23,195
U.S. government agency | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	99,525	77,597
States, municipalities and political subdivisions | General obligations: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	122,438	144,143
States, municipalities and political subdivisions | General obligations: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	51,579	58,409
States, municipalities and political subdivisions | General obligations: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	143,425	128,369
States, municipalities and political subdivisions | General obligations: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	114,646	113,731
States, municipalities and political subdivisions | Special revenue: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	154,786	168,310
States, municipalities and political subdivisions | Special revenue: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	79,425	68,065
States, municipalities and political subdivisions | Special revenue: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	262,588	239,187
States, municipalities and political subdivisions | Special revenue: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	158,358	131,744
Foreign bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	56,207	65,234
Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	205,756	215,674
Corporate bonds | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	98,645	108,860
Corporate bonds | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	214,290	229,903
Corporate bonds | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	186,385	181,687
Corporate bonds | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	78,375	83,123
Corporate bonds | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	146,139	144,612
Corporate bonds | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	259,009	273,951
Mortgage-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	14,486	17,248
Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	154,730	144,460
Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	190,524	174,458
Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	107,734	101,896
Asset-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,622	4,270
Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,498,662	1,453,286
Fixed Maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,426,991	1,444,840
Fixed Maturities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,925,653	2,898,126
Common stocks | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,086	19,671
Common stocks | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	14,406	15,047
Common stocks | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	62,843	51,794
Common stocks | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	24,788	24,117
Common stocks | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	37,226	27,420
Common stocks | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	16,085	15,369
Common stocks | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	113,370	115,950
Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,153	1,048
Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	269,341	246,370
Equity securities: | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,616	24,046
Equity securities: | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	291,957	270,416
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	175	175
Money Market Accounts	13,203	4,810
Corporate-Owned Life Insurance	3,759	2,592
Recurring | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	0
Money Market Accounts	694	11,992
Corporate-Owned Life Insurance	0	0
Recurring | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,217,610	3,168,542
Trading securities	20,003	20,034
Short-Term Investments	175	175
Money Market Accounts	13,897	16,802
Corporate-Owned Life Insurance	3,759	2,592
Total Assets Measured at Fair Value	3,255,444	3,208,145
Recurring | U.S. Treasury | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	21,981	23,195
Recurring | U.S. government agency | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	99,525	77,597
Recurring | States, municipalities and political subdivisions | General obligations: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	122,438	144,143
Recurring | States, municipalities and political subdivisions | General obligations: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	51,579	58,409
Recurring | States, municipalities and political subdivisions | General obligations: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	143,425	128,369
Recurring | States, municipalities and political subdivisions | General obligations: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	114,646	113,731
Recurring | States, municipalities and political subdivisions | Special revenue: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	154,786	168,310
Recurring | States, municipalities and political subdivisions | Special revenue: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	79,425	68,065
Recurring | States, municipalities and political subdivisions | Special revenue: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	262,588	239,187
Recurring | States, municipalities and political subdivisions | Special revenue: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	158,358	131,744
Recurring | Foreign bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	56,207	65,234
Recurring | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	205,756	215,674
Recurring | Corporate bonds | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	98,645	108,860
Recurring | Corporate bonds | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	214,290	229,903
Trading securities	2,117	3,919
Recurring | Corporate bonds | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	186,385	181,687
Trading securities	289	127
Recurring | Corporate bonds | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	78,375	83,123
Trading securities	3,557	3,410
Recurring | Corporate bonds | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	146,139	144,612
Trading securities	1,373	787
Recurring | Corporate bonds | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	259,009	273,951
Trading securities	4,780	4,842
Recurring | Mortgage-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	14,486	17,248
Recurring | Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	154,730	144,460
Recurring | Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	190,524	174,458
Recurring | Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	107,734	101,896
Recurring | Asset-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	4,622	4,270
Recurring | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,498,662	1,453,286
Trading securities	13,673	14,390
Recurring | Fixed Maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,426,991	1,444,840
Trading securities	0	0
Recurring | Fixed Maturities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,925,653	2,898,126
Recurring | Common stocks | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,086	19,671
Recurring | Common stocks | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	14,406	15,047
Recurring | Common stocks | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	62,843	51,794
Recurring | Common stocks | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	24,788	24,117
Recurring | Common stocks | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	37,226	27,420
Recurring | Common stocks | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	16,085	15,369
Recurring | Common stocks | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	113,370	115,950
Recurring | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,153	1,048
Trading securities	2,597	2,121
Recurring | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	269,341	246,370
Trading securities	6,330	5,644
Recurring | Equity securities: | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,616	24,046
Trading securities	0	0
Recurring | Equity securities: | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	291,957	270,416
Recurring | Equity securities: | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	831	613
Recurring | Equity securities: | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	206	286
Recurring | Equity securities: | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	900	877
Recurring | Equity securities: | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,209	1,202
Recurring | Equity securities: | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	369	339
Recurring | Equity securities: | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	218	206
Recurring | Redeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,557	1,305
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	175	175
Money Market Accounts	13,203	4,810
Corporate-Owned Life Insurance	0	0
Recurring | Level 1 | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	0
Money Market Accounts	694	11,992
Corporate-Owned Life Insurance	0	0
Recurring | Level 1 | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	291,223	265,829
Trading securities	7,887	6,949
Short-Term Investments	175	175
Money Market Accounts	13,897	16,802
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	313,182	289,755
Recurring | Level 1 | U.S. Treasury | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | U.S. government agency | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | General obligations: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | General obligations: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | General obligations: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | General obligations: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | Special revenue: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | Special revenue: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | Special revenue: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | States, municipalities and political subdivisions | Special revenue: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Foreign bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Corporate bonds | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Corporate bonds | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 1 | Corporate bonds | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 1 | Corporate bonds | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 1 | Corporate bonds | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 1 | Corporate bonds | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 1 | Mortgage-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Asset-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	1,557	1,305
Recurring | Level 1 | Fixed Maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 1 | Fixed Maturities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 1 | Common stocks | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,086	19,671
Recurring | Level 1 | Common stocks | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	14,406	15,047
Recurring | Level 1 | Common stocks | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	62,843	51,794
Recurring | Level 1 | Common stocks | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	24,788	24,117
Recurring | Level 1 | Common stocks | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	37,226	27,420
Recurring | Level 1 | Common stocks | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	16,085	15,369
Recurring | Level 1 | Common stocks | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	113,370	111,958
Recurring | Level 1 | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	419	453
Trading securities	2,597	2,121
Recurring | Level 1 | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	268,607	243,627
Trading securities	6,330	5,644
Recurring | Level 1 | Equity securities: | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,616	22,202
Trading securities	0	0
Recurring | Level 1 | Equity securities: | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	291,223	265,829
Recurring | Level 1 | Equity securities: | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	831	613
Recurring | Level 1 | Equity securities: | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	206	286
Recurring | Level 1 | Equity securities: | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	900	877
Recurring | Level 1 | Equity securities: | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,209	1,202
Recurring | Level 1 | Equity securities: | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	369	339
Recurring | Level 1 | Equity securities: | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	218	206
Recurring | Level 1 | Redeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,557	1,305
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	3,759	2,592
Recurring | Level 2 | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	0	0
Recurring | Level 2 | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,916,229	2,887,615
Trading securities	12,116	13,085
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	3,759	2,592
Total Assets Measured at Fair Value	2,932,104	2,903,292
Recurring | Level 2 | U.S. Treasury | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	21,981	23,195
Recurring | Level 2 | U.S. government agency | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	99,525	77,597
Recurring | Level 2 | States, municipalities and political subdivisions | General obligations: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	122,438	144,143
Recurring | Level 2 | States, municipalities and political subdivisions | General obligations: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	51,579	58,409
Recurring | Level 2 | States, municipalities and political subdivisions | General obligations: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	143,425	128,369
Recurring | Level 2 | States, municipalities and political subdivisions | General obligations: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	114,646	113,731
Recurring | Level 2 | States, municipalities and political subdivisions | Special revenue: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	154,709	168,142
Recurring | Level 2 | States, municipalities and political subdivisions | Special revenue: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	79,425	68,065
Recurring | Level 2 | States, municipalities and political subdivisions | Special revenue: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	262,588	239,187
Recurring | Level 2 | States, municipalities and political subdivisions | Special revenue: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	158,358	131,744
Recurring | Level 2 | Foreign bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	56,207	65,234
Recurring | Level 2 | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	205,756	215,674
Recurring | Level 2 | Corporate bonds | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	98,645	108,860
Recurring | Level 2 | Corporate bonds | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	214,290	229,903
Trading securities	2,117	3,919
Recurring | Level 2 | Corporate bonds | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	185,686	180,590
Trading securities	289	127
Recurring | Level 2 | Corporate bonds | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	78,375	83,123
Trading securities	3,557	3,410
Recurring | Level 2 | Corporate bonds | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	146,139	144,612
Trading securities	1,373	787
Recurring | Level 2 | Corporate bonds | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	250,992	265,154
Trading securities	4,780	4,842
Recurring | Level 2 | Mortgage-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	14,486	17,248
Recurring | Level 2 | Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	154,730	144,460
Recurring | Level 2 | Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	190,524	174,458
Recurring | Level 2 | Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	107,734	101,896
Recurring | Level 2 | Asset-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,991	3,821
Recurring | Level 2 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,497,931	1,452,737
Trading securities	12,116	13,085
Recurring | Level 2 | Fixed Maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,418,298	1,434,878
Trading securities	0	0
Recurring | Level 2 | Fixed Maturities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,916,229	2,887,615
Recurring | Level 2 | Common stocks | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 2 | Common stocks | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 2 | Common stocks | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 2 | Common stocks | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 2 | Common stocks | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 2 | Common stocks | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 2 | Common stocks | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 2 | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 2 | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 2 | Equity securities: | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 2 | Equity securities: | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 2 | Equity securities: | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 2 | Equity securities: | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 2 | Equity securities: | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 2 | Equity securities: | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 2 | Equity securities: | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 2 | Equity securities: | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 2 | Redeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	0	0
Recurring | Level 3 | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	0	0
Recurring | Level 3 | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	10,158	15,098
Trading securities	0	0
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	10,158	15,098
Recurring | Level 3 | U.S. Treasury | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | U.S. government agency | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | General obligations: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | General obligations: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | General obligations: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | General obligations: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | Special revenue: | Midwest | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	77	168
Recurring | Level 3 | States, municipalities and political subdivisions | Special revenue: | Northeast | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | Special revenue: | South | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | States, municipalities and political subdivisions | Special revenue: | West | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Foreign bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Corporate bonds | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Corporate bonds | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 3 | Corporate bonds | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	699	1,097
Trading securities	0	0
Recurring | Level 3 | Corporate bonds | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 3 | Corporate bonds | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Trading securities	0	0
Recurring | Level 3 | Corporate bonds | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	8,017	8,797
Trading securities	0	0
Recurring | Level 3 | Mortgage-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Asset-backed securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	631	449
Recurring | Level 3 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	731	549
Trading securities	0	0
Recurring | Level 3 | Fixed Maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	8,693	9,962
Trading securities	0	0
Recurring | Level 3 | Fixed Maturities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	9,424	10,511
Recurring | Level 3 | Common stocks | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Common stocks | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Common stocks | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Common stocks | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Common stocks | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Common stocks | Technology, media and telecommunications | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Level 3 | Common stocks | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	3,992
Recurring | Level 3 | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	734	595
Trading securities	0	0
Recurring | Level 3 | Equity securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	734	2,743
Trading securities	0	0
Recurring | Level 3 | Equity securities: | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	1,844
Trading securities	0	0
Recurring | Level 3 | Equity securities: | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	734	4,587
Recurring | Level 3 | Equity securities: | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 3 | Equity securities: | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 3 | Equity securities: | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 3 | Equity securities: | Consumer goods and services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 3 | Equity securities: | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 3 | Equity securities: | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Recurring | Level 3 | Redeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 0	$ 0