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Fair Value Information
6 Months Ended
Jun. 30, 2018
Fair Value Disclosures [Abstract]  
Fair Value Information
Fair Value Information
The following fair value information is based on a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The three levels in the hierarchy used to measure fair value are:
Level 1: Unadjusted quoted prices in active markets accessible at the reporting date for identical assets and liabilities.
Level 2: Quoted prices for similar assets or liabilities in active markets. Quoted prices for identical or similar assets and liabilities in markets that are not considered active or financial instruments for which all significant inputs are observable, either directly or indirectly.
Level 3: Prices or valuations that require inputs that are significant to the valuation and are unobservable.
A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.
In the three months ended June 30, 2018, there were no transfers among Level 1, 2 or 3 fair value determinations.
The following table includes the fair value of our financial instruments for which disclosure of fair value is required (in millions):
 
 
 
June 30, 2018
 
December 31, 2017
 
Fair Value
Hierarchy
Level
 
Carrying
Amount
 
Estimated
Fair
Value
 
Carrying
Amount
 
Estimated
Fair
Value
Assets
 
 
 
 
 
 
 
 
 
Cash, cash equivalents and restricted cash
1
 
$
531.1

 
$
531.1

 
$
219.7

 
$
219.7

Liabilities
 
 
 
 
 
 
 
 
 
Senior Unsecured Notes
1
 
247.4

 
256.6

 
247.1

 
259.7

Senior Secured Term Loan
2
 

 

 
333.8

 
341.1


Cash equivalents are recorded at cost, which approximates fair value due to their short-term nature. The fair value of the senior unsecured notes was based on observable market prices based on trading activity on a primary exchange. The fair value of our senior secured term loan was based on observed trading prices in a secondary market. In the second quarter of 2018, we repaid the remaining amount owed on our senior secured term loan. See Note 7, “Debt” for further details on the retirement of our senior secured term loan.