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Fair Value Measurements
12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Fair Value Measurements
FAIR VALUE MEASUREMENTS
We use a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy, which gives the highest priority to quoted prices in active markets, is comprised of the following three levels:
Level 1 – Unadjusted quoted market prices in active markets for identical assets and liabilities.
Level 2 – Observable inputs, other than Level 1 inputs. Level 2 inputs would typically include quoted prices in markets that are not 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 both significant to the measurement and unobservable.

The following tables provide the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2015 and December 31, 2014 (in thousands):
 
 
Assets at Fair Value as of December 31, 2015
Asset Category
Level 1
 
Level 2
 
Level 3
 
Total
Cash and cash equivalents (1)
$
486,831

 
$

 
$

 
$
486,831

Restricted cash (2)
4,232

 

 

 
4,232

Deferred compensation plan assets (3)
7,497

 

 

 
7,497

Total
$
498,560

 
$

 
$

 
$
498,560

 
 
Assets at Fair Value as of December 31, 2014
Asset Category
Level 1
 
Level 2
 
Level 3
 
Total
Cash and cash equivalents (1)
$
432,056

 
$

 
$

 
$
432,056

Restricted cash (2)
6,474

 

 

 
6,474

Deferred compensation plan assets (3)
3,139

 

 

 
3,139

Total
$
441,669

 
$

 
$

 
$
441,669

_________________
(1)
Cash and cash equivalents consist primarily of money market funds with original maturity dates of three months or less, which are Level 1 assets. At December 31, 2015 and 2014, we had $151.4 million and $156.7 million, respectively, in money market funds.
(2)
Restricted cash is classified as “Prepaid expenses and other” in our consolidated balance sheets.
(3)
Deferred compensation plan assets are classified as “Other assets” in our consolidated balance sheets.
We believe that the carrying values of our financial instruments, which include accounts receivable and other financing commitments, approximate their fair values due primarily to their short-term maturities and low risk of counterparty default. The carrying value of our debt associated with the 2013 Credit Agreement approximates its fair value due to the variable rate on such debt.