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Efficiency and Cost-Reduction Initiatives (Tables)
6 Months Ended
Jun. 30, 2023
Restructuring and Related Activities [Abstract]  
Summary of Expense Incurred By Segments
The following table presents the detail of expense incurred by segment (dollars in thousands):
Six Months Ended June 30, 2023
Advisory
Services
Global
Workplace
Solutions
Real Estate
Investments
CorporateConsolidated
Employee separation benefits$19,158 $29,858 $13,158 $2,538 $64,712 
Lease exit costs39,273 731 4,204 1,143 45,351 
Professional fees and other5,963 19,209 4,097 1,225 30,494 
Subtotal64,394 49,798 21,459 4,906 140,557 
Depreciation expense5,453 44 3,482 — 8,979 
Total$69,847 $49,842 $24,941 $4,906 $149,536 
Of the total expenses above, $2.3 million were incurred during the three months ended June 30, 2023 and the remaining $147.2 million were incurred during the three months ended March 31, 2023.
Schedule of Liability Balance Associated with major Cash-based Charges
The following table shows ending liability balance associated with major cash-based charges (dollars in thousands):
Employee separation benefitsProfessional fees and other
Balance at December 31, 2022$37,014 $10,600 
Expense incurred64,712 30,494 
Payments made(77,215)(41,094)
Balance at June 30, 2023$24,511 $—