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Property, Plant and Equipment
 9 Months Ended
Sep. 30, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
6. Property, Plant and Equipment
Property, plant and equipment, net consisted of the following:
As of September 30,As of December 31,
20242023
(In thousands)
Furniture and fixtures$16,053 $16,036 
Computer and office equipment13,892 13,669 
Telecommunications equipment85,654 82,991 
Leasehold improvements75,875 75,437 
Software16,381 12,552 
Internal-use software development34,752 25,909 
Automobile480 507 
Land27,636 27,771 
Land Improvements1,065 930 
Total cost271,788 255,802 
Less—accumulated depreciation(101,657)(77,938)
Total property, plant and equipment, net$170,131 $177,864 
The Company capitalized $2.7 million and $8.9 million of software development costs for the three and nine months ended September 30, 2024, respectively, and $3.4 million and $8.4 million for the three and nine months ended September 30, 2023, respectively.
Amortization expense related to capitalized software development costs was $1.0 million and $3.0 million for the three and nine months ended September 30, 2024, respectively, and $0.8 million and $2.2 million for the three and nine months ended September 30, 2023, respectively.
The Company recognized depreciation expense, which includes amortization of capitalized software development costs, as follows:
Three months ended September 30,Nine months ended September 30,
2024202320242023
(In thousands)
Cost of revenue$4,679 $4,056 $14,135 $11,790 
Research and development1,628 1,199 4,856 2,461 
Sales and marketing1,107 905 3,355 1,486 
General and administrative575 487 1,659 990 
Total depreciation expense$7,989 $6,647 $24,005 $16,727