v3.26.1
FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Deferred compensation plan assets $ 41,700 $ 40,200
Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 428,155 386,712
Long-term AFS securities 555,497 525,695
Deferred compensation 10,203 11,740
Level 1 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 0 0
Long-term AFS securities 0 0
Deferred compensation 10,203 11,740
Level 2 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 428,155 386,712
Long-term AFS securities 555,497 525,695
Deferred compensation 0 0
Level 3 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 0 0
Long-term AFS securities 0 0
Deferred compensation 0 0
U.S. Treasury securities | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 242,517 201,263
Long-term AFS securities 278,939 290,899
U.S. Treasury securities | Level 1 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 0 0
Long-term AFS securities 0 0
U.S. Treasury securities | Level 2 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 242,517 201,263
Long-term AFS securities 278,939 290,899
U.S. Treasury securities | Level 3 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 0 0
Long-term AFS securities 0 0
Corporate debt securities | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 185,638 185,449
Long-term AFS securities 269,728 227,916
Corporate debt securities | Level 1 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 0 0
Long-term AFS securities 0 0
Corporate debt securities | Level 2 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 185,638 185,449
Long-term AFS securities 269,728 227,916
Corporate debt securities | Level 3 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term AFS securities 0 0
Long-term AFS securities 0 0
U.S. governmental agency securities | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term AFS securities 6,830 6,880
U.S. governmental agency securities | Level 1 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term AFS securities 0 0
U.S. governmental agency securities | Level 2 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term AFS securities 6,830 6,880
U.S. governmental agency securities | Level 3 | Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term AFS securities $ 0 $ 0