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Property and equipment: (Tables)
9 Months Ended
Sep. 30, 2025
Property and equipment:  
Schedule of property and equipment

    

Three Months

    

Three Months

    

Nine months

    

Nine months

Ended

Ended

Ended

Ended

(in thousands)

September 30, 2025

September 30, 2024

September 30, 2025

September 30, 2024

Depreciation and amortization expense

$

59,985

$

85,370

$

210,423

$

230,006

Capitalized compensation cost

 

11,169

11,215

33,615

34,141