FAIR VALUE OF FINANCIAL INSTRUMENTS (Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	$ 23,273	$ 20,034
Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	3,269,661	3,168,542
Corporate-Owned Life Insurance
U.S. Treasury | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	16,891	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	122,168	77,597
Foreign bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	52,753	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	209,144	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	95,053	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	221,707	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	186,257	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	75,408	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	148,979	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	283,151	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	13,691	17,248
Collateralized mortgage obligations | 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	157,483	144,460
Collateralized mortgage obligations | 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	199,152	174,458
Collateralized mortgage obligations | 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	105,432	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	4,636	4,270
Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,535,070	1,453,286
Fixed maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,430,025	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	2,965,095	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	22,439	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	14,565	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	66,519	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	25,688	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	40,103	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	17,508	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	116,447	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	1,297	1,048
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	280,913	246,370
Equity securities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	23,653	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	304,566	270,416
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	175	175
Money Market Accounts	6,147	4,810
Corporate-Owned Life Insurance	4,029	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	10,677	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	3,269,661	3,168,542
Trading Securities	23,273	20,034
Short-Term Investments	175	175
Money Market Accounts	16,824	16,802
Corporate-Owned Life Insurance	4,029	2,592
Total Assets Measured at Fair Value	3,313,962	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	16,891	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	122,168	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	109,696	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	48,641	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	141,519	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	113,011	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	158,744	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	79,760	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	263,512	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	158,307	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	52,753	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	209,144	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	95,053	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	221,707	229,903
Trading Securities	2,220	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	186,257	181,687
Trading Securities	1,535	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	75,408	83,123
Trading Securities	3,741	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	148,979	144,612
Trading Securities	1,221	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	283,151	273,951
Trading Securities	5,566	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	13,691	17,248
Recurring | Collateralized mortgage obligations | 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	157,483	144,460
Recurring | Collateralized mortgage obligations | 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	199,152	174,458
Recurring | Collateralized mortgage obligations | 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	105,432	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	4,636	4,270
Recurring | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,535,070	1,453,286
Trading Securities	16,842	14,390
Recurring | Fixed maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,430,025	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	2,965,095	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	22,439	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	14,565	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	66,519	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	25,688	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	40,103	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	17,508	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	116,447	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	1,297	1,048
Trading Securities	2,541	2,121
Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	280,913	246,370
Trading Securities	6,431	5,644
Recurring | Equity securities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	23,653	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	304,566	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	874	613
Recurring | Equity securities | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	190	286
Recurring | Equity securities | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	989	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	1,314	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	325	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	198	206
Recurring | Redeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	2,559	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	6,147	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	10,677	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	303,682	265,829
Trading Securities	8,990	6,949
Short-Term Investments	175	175
Money Market Accounts	16,824	16,802
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	329,671	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 | Collateralized mortgage obligations | 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 | Collateralized mortgage obligations | 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 | Collateralized mortgage obligations | 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	2,559	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	22,439	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	14,565	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	66,517	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	25,688	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	40,103	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	17,508	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	116,447	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	415	453
Trading Securities	2,541	2,121
Recurring | Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	280,031	243,627
Trading Securities	6,431	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	23,651	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	303,682	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	874	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	190	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	989	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	1,314	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	325	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	198	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	2,559	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	4,029	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	2,956,105	2,887,615
Trading Securities	14,283	13,085
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	4,029	2,592
Total Assets Measured at Fair Value	2,974,417	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	16,891	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	122,168	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	109,696	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	48,641	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	141,519	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	113,011	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	158,744	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	79,760	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	263,512	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	158,307	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	52,753	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	209,144	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	95,053	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	221,707	229,903
Trading Securities	2,220	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	185,589	180,590
Trading Securities	1,535	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	75,408	83,123
Trading Securities	3,741	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	148,979	144,612
Trading Securities	1,221	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	275,474	265,154
Trading Securities	5,566	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	13,691	17,248
Recurring | Level 2 | Collateralized mortgage obligations | 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	157,483	144,460
Recurring | Level 2 | Collateralized mortgage obligations | 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	199,152	174,458
Recurring | Level 2 | Collateralized mortgage obligations | 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	105,432	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	3,989	3,821
Recurring | Level 2 | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1,534,323	1,452,737
Trading Securities	14,283	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	1,421,780	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	2,956,103	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	2	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	2	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	2	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	9,874	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	9,874	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	0	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	668	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	7,677	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 | Collateralized mortgage obligations | 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 | Collateralized mortgage obligations | 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 | Collateralized mortgage obligations | 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	647	449
Recurring | Level 3 | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	747	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	8,245	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	8,992	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	882	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	882	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	882	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