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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities Carried at Fair Value
The following tables present assets and liabilities carried at fair value (in thousands):
Fair Value Measurements Using:
December 31, 2020Quoted
Market
Prices in
Active
Markets
(Level 1)
Other
Observable
Inputs
(Level 2)
Unobservable
Inputs
(Level 3)
Assets:
Cash equivalents$980,580 $504,980 $475,600 $— 
Restricted cash$4,352 $2,054 $2,298 $— 
Liabilities:
Interest rate collar$16,908 $— $16,908 $— 
Fair Value Measurements Using:
December 31, 2019Quoted
Market
Prices in
Active
Markets
(Level 1)
Other
Observable
Inputs
(Level 2)
Unobservable
Inputs
(Level 3)
Assets:
Cash equivalents$1,086,402 $— $1,086,402 $— 
Restricted cash$6,388 $2,048 $4,340 $— 
Liabilities:
Interest rate collar$3,847 $— $3,847 $—