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FAIR VALUE MEASUREMENTS
9 Months Ended
Sep. 30, 2017
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS
FAIR VALUE MEASUREMENTS
We measure our financial assets and liabilities in accordance with Accounting Standards Codification™ ("ASC") Topic 820, Fair Value Measurements and Disclosures.
For cash and cash equivalents, certificates of deposit and time deposit investments, accounts receivable, refundable income taxes, and accounts payable, the carrying amount approximates fair value because of the short-term maturity of these instruments.
The estimated fair value of the long‑term debt is estimated using a discounted cash flow analysis based on current borrowing rates for debt with similar remaining maturities and ratings (a Level 2 input) and is designed to approximate the amount at which the instruments could be exchanged in an arm's-length transaction between knowledgeable willing parties. The carrying value and estimated fair value of our long-term debt as of September 30, 2017, and December 31, 2016, were as follows (in thousands):
 
 
September 30, 2017
 
December 31, 2016
 
 
Carrying Value
 
Fair Value
 
Carrying Value
 
Fair Value
Senior notes
 
$
60,000

 
$
60,000

 
$
135,000

 
$
131,000