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Fair Value Measurements
6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The following tables present assets and liabilities carried at fair value (in thousands): 
Fair Value Measurements Using:
June 30,
2020
Quoted
Market
Prices in
Active
Markets
(Level 1)
Other
Observable
Inputs
(Level 2)
Unobservable
Inputs
(Level 3)
Assets:
Cash equivalents$1,390,062  $503,794  $886,268  —  
Restricted cash$4,847  $2,054  $2,793  —  
Liabilities:
Interest rate collar$22,802  —  $22,802  —  
Fair Value Measurements Using:
December 31,
2019
Quoted
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  —