FAIR VALUE OF FINANCIAL INSTRUMENTS (Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	$ 13,240	$ 16,842
Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,535,070
Fixed maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,430,025
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
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments		175
Money Market Accounts		6,147
Corporate-Owned Life Insurance		4,029
Recurring | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments		0
Money Market Accounts		10,677
Corporate-Owned Life Insurance		0
Recurring | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	248,361	16,842
Short-Term Investments	175	175
Money Market Accounts	3,275	16,824
Corporate-Owned Life Insurance	4,907	4,029
Total Assets Measured at Fair Value	2,019,446	3,313,962
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	27,418	16,891
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	214,682	122,168
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	95,212	109,696
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	37,655	48,641
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	113,911	141,519
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	107,841	113,011
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	140,764	158,744
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	61,948	79,760
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	235,809	263,512
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	142,920	158,307
Recurring | Foreign bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	9,716	52,753
Recurring | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	56,059	209,144
Recurring | Corporate bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	13,240
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	28,648	95,053
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	53,085	221,707
Trading and Equity Securities	397	2,220
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	53,646	186,257
Trading and Equity Securities	1,599	1,535
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	16,658	75,408
Trading and Equity Securities	3,236	3,741
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	26,176	148,979
Trading and Equity Securities	3,028	1,221
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	79,349	283,151
Trading and Equity Securities	2,231	5,566
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	7,424	13,691
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	76,701	157,483
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	107,623	199,152
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	52,748	105,432
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	3,495	4,636
Recurring | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,535,070
Trading and Equity Securities		16,842
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
Trading and Equity Securities		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	1,749,488	2,965,095
Recurring | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	5,651	3,838
Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		287,344
Recurring | Equity securities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		23,653
Recurring | Equity securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		310,997
Trading and Equity Securities		310,997
Recurring | Equity securities | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	15,949	23,313
Recurring | Equity securities | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	10,975	14,755
Recurring | Equity securities | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	53,536	67,508
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 and Equity Securities	24,465	27,002
Recurring | Equity securities | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	22,286	40,428
Recurring | Equity securities | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	13,944	17,508
Recurring | Equity securities | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	101,555	116,645
Recurring | Redeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	2,749	2,559
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments		175
Money Market Accounts		6,147
Corporate-Owned Life Insurance		0
Recurring | Level 1 | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments		0
Money Market Accounts		10,677
Corporate-Owned Life Insurance		0
Recurring | Level 1 | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	247,766	2,559
Short-Term Investments	175	175
Money Market Accounts	3,275	16,824
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	253,965	329,671
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 | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	2,749
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 and Equity 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 and Equity 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 and Equity 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 and Equity 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 and Equity 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
Trading and Equity Securities		2,559
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
Trading and Equity Securities		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 | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	5,056	2,956
Recurring | Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		286,462
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
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		310,113
Trading and Equity Securities		310,113
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 and Equity Securities	15,949	23,313
Recurring | Level 1 | Equity securities | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	10,975	14,755
Recurring | Level 1 | Equity securities | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	53,536	67,506
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 and Equity Securities	24,465	27,002
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 and Equity Securities	22,286	40,428
Recurring | Level 1 | Equity securities | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	13,944	17,508
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 and Equity Securities	101,555	116,645
Recurring | Level 1 | Redeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	2,749	2,559
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments		0
Money Market Accounts		0
Corporate-Owned Life Insurance		4,029
Recurring | Level 2 | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments		0
Money Market Accounts		0
Corporate-Owned Life Insurance		0
Recurring | Level 2 | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	0	14,283
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	4,907	4,029
Total Assets Measured at Fair Value	1,763,970	2,974,417
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	27,418	16,891
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	214,682	122,168
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	95,212	109,696
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	37,655	48,641
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	113,911	141,519
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	107,841	113,011
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	140,764	158,744
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	61,948	79,760
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	235,809	263,512
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	142,920	158,307
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	9,716	52,753
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	56,059	209,144
Recurring | Level 2 | Corporate bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	10,491
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	28,648	95,053
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	53,085	221,707
Trading and Equity Securities	397	2,220
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	53,646	185,589
Trading and Equity Securities	1,599	1,535
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	16,658	75,408
Trading and Equity Securities	3,236	3,741
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	26,176	148,979
Trading and Equity Securities	3,028	1,221
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	79,099	275,474
Trading and Equity Securities	2,231	5,566
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	7,424	13,691
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	76,701	157,483
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	107,623	199,152
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	52,748	105,432
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	2,829	3,989
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
Trading and Equity Securities		14,283
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
Trading and Equity Securities		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	1,748,572	2,956,103
Recurring | Level 2 | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity 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
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
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
Trading and Equity Securities		2
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 and Equity 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 and Equity 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 and Equity Securities	0	2
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 and Equity 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 and Equity Securities	0	0
Recurring | Level 2 | Equity securities | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity 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 and Equity 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 and Equity Securities	0	0
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments		0
Money Market Accounts		0
Corporate-Owned Life Insurance		0
Recurring | Level 3 | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments		0
Money Market Accounts		0
Corporate-Owned Life Insurance		0
Recurring | Level 3 | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	595	0
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	1,511	9,874
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	0
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 | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	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 and Equity 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	0	668
Trading and Equity 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 and Equity 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 and Equity 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	250	7,677
Trading and Equity 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	666	647
Recurring | Level 3 | Fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		747
Trading and Equity Securities		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
Trading and Equity Securities		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	916	8,992
Recurring | Level 3 | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity Securities	595	882
Recurring | Level 3 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		882
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
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
Trading and Equity Securities		882
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 and Equity 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 and Equity 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 and Equity 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 and Equity 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 and Equity Securities	0	0
Recurring | Level 3 | Equity securities | Technology, media and telecommunications
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading and Equity 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 and Equity 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 and Equity Securities	$ 0	$ 0