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Property and equipment: (Tables)
6 Months Ended
Jun. 30, 2023
Property and equipment:  
Schedule of property and equipment

    

Three Months

    

Three Months

    

Six Months

    

Six Months

Ended

Ended

Ended

Ended

(in thousands)

June 30, 2023

June 30, 2022

June 30, 2023

June 30, 2022

Depreciation and amortization expense

$

51,153

$

23,071

$

76,306

$

45,762

Capitalized compensation cost

 

8,723

3,112

12,441

6,290