v3.25.2
Shareholder Report, Holdings (Details) - C000014130 [Member]
Jun. 30, 2025
Holdings [Line Items]  
Percent of Total Investments 100.00% [1]
Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.00% [1]
Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [1]
Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.00% [1]
Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [1]
Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [1]
Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [1]
Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [1]
Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [1]
Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 20.00% [1]
Cash and Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.20% [2]
Stock with Fixed Exchange Ratio [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.60% [2]
Friendly [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00%
Stock with Fixed Exchange Ratio Collar [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.40% [2]
Financial [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.60%
Strategic [Member]  
Holdings [Line Items]  
Percent of Total Investments 85.40%
Cash [Member]  
Holdings [Line Items]  
Percent of Total Investments 69.80% [2]
[1] Percentage of total investments as of June 30, 2025.
[2] Data expressed as a percentage of long common stock, corporate bonds and swap contract positions as of June 30, 2025.