v2.4.0.8
Fair Value of Financial Instruments (Fair Value and Carrying Value of Financial Instruments Measured on a Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: $ 39,333 $ 59,982
Derivative Assets: 2 834
Separate Account Assets: 4,353,490 4,035,053
Derivative Liabilities: 0 3,172
Significant unobservable inputs Level 3
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets 298 2,322
Recurring | Quoted Prices in active markets Level 1
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 2,434
Available for sale securities: 7,872 5,290
Derivative Assets: 0 0
Separate Account Assets: 420,734 354,895
Total assets 428,606 362,619
Total liabilities 18,945 20,175
Recurring | Quoted Prices in active markets Level 1 | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities: 18,945 20,175
Recurring | Quoted Prices in active markets Level 1 | IRS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liabilities:   0
Recurring | Quoted Prices in active markets Level 1 | Exchange-traded equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities:   2,434
Recurring | Quoted Prices in active markets Level 1 | Privately held equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 [1] 0 [2]
Recurring | Quoted Prices in active markets Level 1 | Tax exempt securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 0
Recurring | Quoted Prices in active markets Level 1 | CDO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 0
Recurring | Quoted Prices in active markets Level 1 | CLO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 0
Recurring | Quoted Prices in active markets Level 1 | Corporate bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 [3] 0 [4]
Available for sale securities: 0 0
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Corporate loans
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 0 [5] 0 [6]
Recurring | Quoted Prices in active markets Level 1 | U.S. government obligations
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities:   0
Recurring | Quoted Prices in active markets Level 1 | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 7,872 5,290
Separate Account Assets: 13,706 19,230
Recurring | Quoted Prices in active markets Level 1 | Obligations of state and political subdivisions
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 0 0
Recurring | Quoted Prices in active markets Level 1 | Certificates of deposit
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 0 0
Recurring | Quoted Prices in active markets Level 1 | Asset-backed securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 0 0
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | CDS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Cash
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 4,039 3,771
Recurring | Quoted Prices in active markets Level 1 | Short-term investments
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 131,750 87,409
Recurring | Quoted Prices in active markets Level 1 | U.S. government agencies
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Municipal bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Preferred stocks
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 25 25
Recurring | Quoted Prices in active markets Level 1 | Common stock
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 107,587 97,600
Recurring | Quoted Prices in active markets Level 1 | Mutual funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 163,627 146,860
Recurring | Quoted Prices in active markets Level 1 | Real estate funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Private equity
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Multi-strategy
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Long/short
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Fund of funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Event driven
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Long only
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Global Macro
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Fixed income arbitrage
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Master limited partnerships
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Fixed income (non-arbitrage)
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Quoted Prices in active markets Level 1 | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 33,880 50,784
Available for sale securities: 9,849 11,013
Derivative Assets: 0 0
Separate Account Assets: 211,356 207,958
Total assets 1,717,862 1,026,066
Total liabilities 0 3,172
Recurring | Other Significant Observable inputs Level 2 | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities: 0 0
Recurring | Other Significant Observable inputs Level 2 | IRS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liabilities:   3,172
Recurring | Other Significant Observable inputs Level 2 | Exchange-traded equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities:   0
Recurring | Other Significant Observable inputs Level 2 | Privately held equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 [1] 0 [2]
Recurring | Other Significant Observable inputs Level 2 | Tax exempt securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 33,880 50,784
Recurring | Other Significant Observable inputs Level 2 | CDO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 0
Recurring | Other Significant Observable inputs Level 2 | CLO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 0
Recurring | Other Significant Observable inputs Level 2 | Corporate bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 0 [3] 0 [4]
Available for sale securities: 5,424 6,277
Separate Account Assets: 13,230 18,373
Recurring | Other Significant Observable inputs Level 2 | Corporate loans
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 1,462,777 [5] 756,311 [6]
Recurring | Other Significant Observable inputs Level 2 | U.S. government obligations
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities:   3,851
Recurring | Other Significant Observable inputs Level 2 | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 0 0
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Obligations of state and political subdivisions
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 4,237 478
Recurring | Other Significant Observable inputs Level 2 | Certificates of deposit
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 100 100
Recurring | Other Significant Observable inputs Level 2 | Asset-backed securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 88 307
Separate Account Assets: 8,170 2,843
Recurring | Other Significant Observable inputs Level 2 | CDS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Cash
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Short-term investments
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | U.S. government agencies
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 569 1,625
Recurring | Other Significant Observable inputs Level 2 | Municipal bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 3,568 3,034
Recurring | Other Significant Observable inputs Level 2 | Preferred stocks
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Common stock
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Mutual funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Real estate funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Private equity
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Multi-strategy
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 63,996 58,580
Recurring | Other Significant Observable inputs Level 2 | Long/short
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 27,530 32,665
Recurring | Other Significant Observable inputs Level 2 | Fund of funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 1,514 1,347
Recurring | Other Significant Observable inputs Level 2 | Event driven
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 45,776 40,907
Recurring | Other Significant Observable inputs Level 2 | Long only
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 33,960 31,825
Recurring | Other Significant Observable inputs Level 2 | Global Macro
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 11,663 11,562
Recurring | Other Significant Observable inputs Level 2 | Fixed income arbitrage
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Master limited partnerships
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Fixed income (non-arbitrage)
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 1,155 5,013
Recurring | Other Significant Observable inputs Level 2 | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Other Significant Observable inputs Level 2 | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 225 184
Recurring | Significant unobservable inputs Level 3
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 24,450 25,734
Available for sale securities: 0 0
Derivative Assets: 2 834
Separate Account Assets: 3,721,400 3,472,200
Total assets 3,745,852 3,504,623
Total liabilities 0 0
Recurring | Significant unobservable inputs Level 3 | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities: 0 0
Recurring | Significant unobservable inputs Level 3 | IRS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liabilities:   0
Recurring | Significant unobservable inputs Level 3 | Exchange-traded equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities:   0
Recurring | Significant unobservable inputs Level 3 | Privately held equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 5,074 [1] 7,809 [2]
Recurring | Significant unobservable inputs Level 3 | Tax exempt securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 298 264
Recurring | Significant unobservable inputs Level 3 | CDO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 820 650
Recurring | Significant unobservable inputs Level 3 | CLO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 721 525
Recurring | Significant unobservable inputs Level 3 | Corporate bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 17,537 [3] 16,486 [4]
Available for sale securities: 0 0
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Corporate loans
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 0 [5] 5,855 [6]
Recurring | Significant unobservable inputs Level 3 | U.S. government obligations
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities:   0
Recurring | Significant unobservable inputs Level 3 | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 0 0
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Obligations of state and political subdivisions
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 0 0
Recurring | Significant unobservable inputs Level 3 | Certificates of deposit
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 0 0
Recurring | Significant unobservable inputs Level 3 | Asset-backed securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 0 0
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | CDS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets: 2 834
Recurring | Significant unobservable inputs Level 3 | Cash
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Short-term investments
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | U.S. government agencies
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Municipal bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Preferred stocks
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Common stock
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Mutual funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Real estate funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 2,593,508 2,563,992
Recurring | Significant unobservable inputs Level 3 | Private equity
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 244 251
Recurring | Significant unobservable inputs Level 3 | Multi-strategy
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 672,564 617,979
Recurring | Significant unobservable inputs Level 3 | Long/short
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 79,445 75,640
Recurring | Significant unobservable inputs Level 3 | Fund of funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 188,626 123,793
Recurring | Significant unobservable inputs Level 3 | Event driven
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 36,541 29,230
Recurring | Significant unobservable inputs Level 3 | Long only
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Significant unobservable inputs Level 3 | Global Macro
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 7,699 7,374
Recurring | Significant unobservable inputs Level 3 | Fixed income arbitrage
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 4,917 4,994
Recurring | Significant unobservable inputs Level 3 | Master limited partnerships
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 132,236 42,501
Recurring | Significant unobservable inputs Level 3 | Fixed income (non-arbitrage)
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 5,536 4,700
Recurring | Significant unobservable inputs Level 3 | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 84 1,746
Recurring | Significant unobservable inputs Level 3 | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 0 0
Recurring | Fair Value
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 58,330 78,952
Available for sale securities: 17,721 16,303
Derivative Assets: 2 834
Separate Account Assets: 4,353,490 4,035,053
Total assets 5,892,320 4,893,308
Total liabilities 18,945 23,347
Recurring | Fair Value | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities: 18,945 20,175
Recurring | Fair Value | IRS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liabilities:   3,172
Recurring | Fair Value | Exchange-traded equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities:   2,434
Recurring | Fair Value | Privately held equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 5,074 [1] 7,809 [2]
Recurring | Fair Value | Tax exempt securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 34,178 51,048
Recurring | Fair Value | CDO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 820 650
Recurring | Fair Value | CLO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 721 525
Recurring | Fair Value | Corporate bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 17,537 [3] 16,486 [4]
Available for sale securities: 5,424 6,277
Separate Account Assets: 13,230 18,373
Recurring | Fair Value | Corporate loans
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 1,462,777 [5] 762,166 [6]
Recurring | Fair Value | U.S. government obligations
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities:   3,851
Recurring | Fair Value | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 7,872 5,290
Separate Account Assets: 13,706 19,230
Recurring | Fair Value | Obligations of state and political subdivisions
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 4,237 478
Recurring | Fair Value | Certificates of deposit
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 100 100
Recurring | Fair Value | Asset-backed securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 88 307
Separate Account Assets: 8,170 2,843
Recurring | Fair Value | CDS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets: 2 834
Recurring | Fair Value | Cash
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 4,039 3,771
Recurring | Fair Value | Short-term investments
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 131,750 87,409
Recurring | Fair Value | U.S. government agencies
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 569 1,625
Recurring | Fair Value | Municipal bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 3,568 3,034
Recurring | Fair Value | Preferred stocks
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 25 25
Recurring | Fair Value | Common stock
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 107,587 97,600
Recurring | Fair Value | Mutual funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 163,627 146,860
Recurring | Fair Value | Real estate funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 2,593,508 2,563,992
Recurring | Fair Value | Private equity
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 244 251
Recurring | Fair Value | Multi-strategy
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 736,560 676,559
Recurring | Fair Value | Long/short
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 106,975 108,305
Recurring | Fair Value | Fund of funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 190,140 125,140
Recurring | Fair Value | Event driven
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 82,317 70,137
Recurring | Fair Value | Long only
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 33,960 31,825
Recurring | Fair Value | Global Macro
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 19,362 18,936
Recurring | Fair Value | Fixed income arbitrage
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 4,917 4,994
Recurring | Fair Value | Master limited partnerships
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 132,236 42,501
Recurring | Fair Value | Fixed income (non-arbitrage)
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 6,691 9,713
Recurring | Fair Value | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 84 1,746
Recurring | Fair Value | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 225 184
Carrying Value
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 39,333 59,982
Corporate loans 32,443 5,467
Available for sale securities: 17,721 16,303
Derivative Assets: 2 834
Separate Account Assets: 4,353,490 4,035,053
Total assets 6,314,692 5,202,015
Derivative Liabilities:   3,172
Total liabilities 5,908,989 4,874,358
Carrying Value | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 58,330 78,952
Available for sale securities: 17,721 16,303
Derivative Assets: 2 834
Separate Account Assets: 4,353,490 4,035,053
Total assets 5,892,320 4,893,308
Total liabilities 18,945 23,347
Carrying Value | Recurring | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities: 18,945 20,175
Carrying Value | Recurring | IRS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liabilities:   3,172
Carrying Value | Recurring | Exchange-traded equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities:   2,434
Carrying Value | Recurring | Privately held equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 5,074 [1] 7,809 [2]
Carrying Value | Recurring | Tax exempt securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 34,178 51,048
Carrying Value | Recurring | CDO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 820 650
Carrying Value | Recurring | CLO
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 721 525
Carrying Value | Recurring | Corporate bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 17,537 [3] 16,486 [4]
Available for sale securities: 5,424 6,277
Separate Account Assets: 13,230 18,373
Carrying Value | Recurring | Corporate loans
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 1,462,777 [5] 762,166 [6]
Carrying Value | Recurring | U.S. government obligations
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities:   3,851
Carrying Value | Recurring | U.S. Treasury securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 7,872 5,290
Separate Account Assets: 13,706 19,230
Carrying Value | Recurring | Obligations of state and political subdivisions
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 4,237 478
Carrying Value | Recurring | Certificates of deposit
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 100 100
Carrying Value | Recurring | Asset-backed securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities: 88 307
Separate Account Assets: 8,170 2,843
Carrying Value | Recurring | CDS
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Assets: 2 834
Carrying Value | Recurring | Cash
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 4,039 3,771
Carrying Value | Recurring | Short-term investments
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 131,750 87,409
Carrying Value | Recurring | U.S. government agencies
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 569 1,625
Carrying Value | Recurring | Municipal bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 3,568 3,034
Carrying Value | Recurring | Preferred stocks
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 25 25
Carrying Value | Recurring | Common stock
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 107,587 97,600
Carrying Value | Recurring | Mutual funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 163,627 146,860
Carrying Value | Recurring | Real estate funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 2,593,508 2,563,992
Carrying Value | Recurring | Private equity
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 244 251
Carrying Value | Recurring | Multi-strategy
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 736,560 676,559
Carrying Value | Recurring | Long/short
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 106,975 108,305
Carrying Value | Recurring | Fund of funds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 190,140 125,140
Carrying Value | Recurring | Event driven
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 82,317 70,137
Carrying Value | Recurring | Long only
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 33,960 31,825
Carrying Value | Recurring | Global Macro
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 19,362 18,936
Carrying Value | Recurring | Fixed income arbitrage
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 4,917 4,994
Carrying Value | Recurring | Master limited partnerships
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 132,236 42,501
Carrying Value | Recurring | Fixed income (non-arbitrage)
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 6,691 9,713
Carrying Value | Recurring | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 84 1,746
Carrying Value | Recurring | Other
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Separate Account Assets: 225 184
CLO | Recurring | Other Significant Observable inputs Level 2 | Privately held equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities:   2,484 [2]
CLO | Recurring | Other Significant Observable inputs Level 2 | Corporate loans
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans 1,334,310 [5] 735,888 [6]
CLO | Recurring | Significant unobservable inputs Level 3 | Privately held equity securities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 1,460 [1]  
CLO | Recurring | Significant unobservable inputs Level 3 | Corporate bonds
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities: 17,537 [3] 16,486 [4]
CLO | Recurring | Significant unobservable inputs Level 3 | Corporate loans
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate loans   $ 5,855 [6]
[1] Includes $1,460 related to CLOs classified in Level 3.
[2] Includes $2,484 related to CLOs classified in Level 3.
[3] Includes $17,537 related to CLOs classified in Level 3.
[4] Includes $16,486 related to CLOs classified in Level 3.
[5] Includes $1,334,310 related to CLOs classified in Level 2.
[6] Includes $735,888 and $5,855 classified in Level 2 and Level 3, respectively, related to CLOs.