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Fair value of financial instruments (Tables)
 6 Months Ended
Jun. 30, 2022
Fair Value Disclosures [Abstract]  
Assets, Liabilities and Temporary Equity Measured at Fair Value on a Recurring Basis The following table summarizes the Company’s assets, liabilities and temporary equities measured at fair value on a recurring basis as of June 30, 2022: 
TotalQuoted prices in
active markets
for identical assets
(Level 1)		Significant other
observable inputs
(Level 2)		Significant
unobservable
inputs
(Level 3)
Assets    
Investments in equity securities$40,214 $40,214 $— $— 
Interest rate cap agreements$84,619 $— $84,619 $— 
Liabilities   
Contingent earn-out obligations$29,299 $— $— $29,299 
Temporary equity    
Noncontrolling interests subject to put provisions$1,385,821 $— $— $1,385,821