Fair Value of Financial Instruments (Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	$ 1,792,019	$ 1,535,070
Available-for-sale, equity securities		280,913
Trading securities	14,705	16,842
Equity securities	260,979	287,344
Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	0	1,430,025
Available-for-sale, equity securities		23,653
Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	1,792,019	2,965,095
Available-for-sale, equity securities		304,566
Available-for-sale securities, fair value		3,269,661
U.S. Treasury | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	119,954	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, debt securities	194,269	122,168
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, debt securities	99,661	109,696
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, debt securities	41,111	48,641
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, debt securities	118,317	141,519
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, debt securities	109,571	113,011
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, debt securities	143,766	158,744
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, debt securities	62,884	79,760
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, debt securities	244,013	263,512
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, debt securities	146,170	158,307
Foreign bonds | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	7,823	52,753
Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	48,684	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, debt securities	22,272	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, debt securities	41,943	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, debt securities	43,526	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, debt securities	12,977	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, debt securities	25,885	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, debt securities	71,937	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, debt securities	8,187	13,691
Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	71,013	157,483
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, debt securities	109,174	199,152
Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	45,398	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, debt securities	3,484	4,636
Common stocks | Public utilities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		22,439
Common stocks | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		14,565
Common stocks | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		66,519
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, equity securities		25,688
Common stocks | Health care | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		40,103
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, equity securities		17,508
Common stocks | Financial services | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		116,447
Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		1,297
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	175	175
Money Market Accounts	25,927	6,147
Corporate-Owned Life Insurance	4,625	4,029
Recurring | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	0	0
Money Market Accounts	0	10,677
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, debt securities	1,792,019
Available-for-sale securities, fair value		3,269,661
Trading securities	14,705	23,273
Equity securities	260,979
Short-Term Investments	175	175
Money Market Accounts	25,927	16,824
Corporate-Owned Life Insurance	4,625	4,029
Total Assets Measured at Fair Value	2,098,430	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, debt securities	119,954	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, debt securities	194,269	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, debt securities	99,661	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, debt securities	41,111	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, debt securities	118,317	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, debt securities	109,571	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, debt securities	143,766	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, debt securities	62,884	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, debt securities	244,013	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, debt securities	146,170	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, debt securities	7,823	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, debt securities	48,684	209,144
Recurring | Corporate bonds | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	22,272	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, debt securities	41,943	221,707
Trading securities	2,099	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, debt securities	43,526	186,257
Trading securities	1,772	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, debt securities	12,977	75,408
Trading securities	3,914	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, debt securities	25,885	148,979
Trading securities	1,960	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, debt securities	71,937	283,151
Trading securities	2,120	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, debt securities	8,187	13,691
Recurring | Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	71,013	157,483
Recurring | Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	109,174	199,152
Recurring | Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	45,398	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, debt securities	3,484	4,636
Recurring | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	1,792,019	1,535,070
Trading securities	14,705	16,842
Recurring | Fixed Maturities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	0	1,430,025
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, debt securities		2,965,095
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, equity securities		22,439
Equity securities	15,565
Recurring | Common stocks | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		14,565
Equity securities	14,029
Recurring | Common stocks | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		66,519
Equity securities	58,683
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, equity securities		25,688
Equity securities	24,328
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, equity securities		40,103
Equity securities	19,503
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, equity securities		17,508
Equity securities	14,624
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, equity securities		116,447
Equity securities	110,222
Recurring | Nonredeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		1,297
Trading securities		2,541
Equity securities	4,025
Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		280,913
Trading securities		6,431
Equity securities	260,979
Recurring | Equity securities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		23,653
Trading securities		0
Equity securities	0
Recurring | Equity securities | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		304,566
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
Recurring | Equity securities | Energy | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		190
Recurring | Equity securities | Industrials | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		989
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
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
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
Recurring | Redeemable preferred stocks | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,840	2,559
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-Term Investments	175	175
Money Market Accounts	25,927	6,147
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	0	10,677
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, debt securities	0
Available-for-sale securities, fair value		303,682
Trading securities	2,840	8,990
Equity securities	260,310
Short-Term Investments	175	175
Money Market Accounts	25,927	16,824
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	289,252	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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt securities	0	0
Recurring | Level 1 | Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	0	0
Recurring | Level 1 | Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	0	0
Recurring | Level 1 | Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt 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, debt securities	0	0
Recurring | Level 1 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	0	0
Trading securities	2,840	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, debt 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, debt securities		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, equity securities		22,439
Equity securities	15,565
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, equity securities		14,565
Equity securities	14,029
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, equity securities		66,517
Equity securities	58,683
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, equity securities		25,688
Equity securities	24,328
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, equity securities		40,103
Equity securities	19,503
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, equity securities		17,508
Equity securities	14,624
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, equity securities		116,447
Equity securities	110,222
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, equity securities		415
Trading securities		2,541
Equity securities	3,356
Recurring | Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		280,031
Trading securities		6,431
Equity securities	260,310
Recurring | Level 1 | Equity securities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		23,651
Trading securities		0
Equity securities	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, equity securities		303,682
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
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
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
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
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
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
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	2,840	2,559
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	4,625	4,029
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, debt securities	1,791,280
Available-for-sale securities, fair value		2,956,105
Trading securities	11,865	14,283
Equity securities	0
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	4,625	4,029
Total Assets Measured at Fair Value	1,807,770	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, debt securities	119,954	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, debt securities	194,269	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, debt securities	99,661	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, debt securities	41,111	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, debt securities	118,317	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, debt securities	109,571	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, debt securities	143,766	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, debt securities	62,884	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, debt securities	244,013	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, debt securities	146,170	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, debt securities	7,823	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, debt securities	48,684	209,144
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, debt securities	22,272	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, debt securities	41,943	221,707
Trading securities	2,099	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, debt securities	43,526	185,589
Trading securities	1,772	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, debt securities	12,977	75,408
Trading securities	3,914	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, debt securities	25,885	148,979
Trading securities	1,960	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, debt securities	71,837	275,474
Trading securities	2,120	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, debt securities	8,187	13,691
Recurring | Level 2 | Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	71,013	157,483
Recurring | Level 2 | Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	109,174	199,152
Recurring | Level 2 | Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	45,398	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, debt securities	2,845	3,989
Recurring | Level 2 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	1,791,280	1,534,323
Trading securities	11,865	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, debt securities	0	1,421,780
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, debt securities		2,956,103
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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		2
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Trading securities		0
Equity securities	0
Recurring | Level 2 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		0
Trading securities		0
Equity 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, equity securities		2
Trading securities		0
Equity securities	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, 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 securities		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
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
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
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
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
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, debt securities	739
Available-for-sale securities, fair value		9,874
Trading securities	0	0
Equity securities	669
Short-Term Investments	0	0
Money Market Accounts	0	0
Corporate-Owned Life Insurance	0	0
Total Assets Measured at Fair Value	1,408	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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt 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, debt securities	0	668
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, debt 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, debt 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, debt securities	100	7,677
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, debt securities	0	0
Recurring | Level 3 | Government national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	0	0
Recurring | Level 3 | Federal home loan mortgage corporation | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	0	0
Recurring | Level 3 | Federal national mortgage association | Continuing and Discontinuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt 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, debt securities	639	647
Recurring | Level 3 | Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, debt securities	739	747
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, debt securities	0	8,245
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, debt securities		8,992
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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	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, equity securities		0
Equity securities	0
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, equity securities		882
Trading securities		0
Equity securities	669
Recurring | Level 3 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		882
Trading securities		0
Equity securities	669
Recurring | Level 3 | Equity securities | Discontinued Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale, equity securities		0
Trading securities		0
Equity 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, 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 securities		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
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
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
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
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
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