v3.25.4
Property and Equipment
 12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and equipment
Property and equipment comprised the following:
 December 31,
 20252024
Land$40,495 $50,172 
Buildings402,622 428,994 
Leasehold improvements4,312,646 4,180,747 
Equipment and information systems, including internally developed software4,536,973 4,410,395 
New center and capital asset projects in progress122,364 133,311 
9,415,100 9,203,619 
Less accumulated depreciation(6,602,134)(6,262,703)
 $2,812,966 $2,940,916 
Depreciation and amortization expenses are computed using the straight-line method over the useful lives of the assets estimated as follows: buildings, 25 years to 40 years; leasehold improvements, the shorter of ten years or the expected lease
term; and equipment and information systems, including internally developed software, principally three years to 15 years. Depreciation expense on property and equipment was $708,252, $716,396 and $736,474 for 2025, 2024 and 2023, respectively.