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Fair Value Measurements
12 Months Ended
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]  
Fair value measurements
NOTE 2 – FAIR VALUE MEASUREMENTS

Financial assets and liabilities measured at fair value on a recurring basis:
The Company’s marketable securities were accounted for as trading securities and the carrying amount of the Company’s marketable securities were included as a component of “Other assets, net” on the accompanying Consolidated Balance Sheets as of December 31, 2016 and 2015. The Company recorded an increase in fair value related to its marketable securities in the amount of $1.9 million for the year ended December 31, 2016, and a decrease in the amount of $0.2 million for the year ended December 31, 2015, which were included in “Other income (expense)” on the accompanying Consolidated Statements of Income.

The tables below identify the estimated fair value of the Company’s marketable securities, determined by reference to quoted market prices (Level 1), as of December 31, 2016 and 2015 (in thousands):
 
December 31, 2016
 
Quoted Prices in Active Markets for Identical Instruments
(Level 1)
 
Significant Other Observable Inputs
(Level 2)
 
Significant Unobservable Inputs
(Level 3)
 
Total
Marketable securities
$
20,462

 
$

 
$

 
$
20,462


 
December 31, 2015
 
Quoted Prices in Active Markets for Identical Instruments
(Level 1)
 
Significant Other Observable Inputs
(Level 2)
 
Significant Unobservable Inputs
(Level 3)
 
Total
Marketable securities
$
16,895

 
$

 
$

 
$
16,895



Non-financial assets and liabilities measured at fair value on a nonrecurring basis:
Certain long-lived non-financial assets and liabilities may be required to be measured at fair value on a nonrecurring basis in certain circumstances, including when there is evidence of impairment. These non-financial assets and liabilities may include assets acquired in a business combination or property and equipment that are determined to be impaired. As of December 31, 2016 and 2015, the Company did not have any non-financial assets or liabilities that had been measured at fair value subsequent to initial recognition.

Fair value of financial instruments:
The carrying amounts of the Company’s senior notes are included in “Long-term debt” on the accompanying Consolidated Balance Sheets as of December 31, 2016 and 2015. See Note 5 for further information concerning the Company’s senior notes.

The table below identifies the estimated fair value of the Company’s senior notes, using the market approach. The fair values as of December 31, 2016 and 2015, were determined by reference to quoted market prices of the same or similar instruments (Level 2) (in thousands):
 
December 31, 2016
 
December 31, 2015
 
Carrying Amount
 
Estimated Fair Value
 
Carrying Amount
 
Estimated Fair Value
$500 million, 4.875% Senior Notes due 2021
$
496,758

 
$
538,678

 
$
495,951

 
$
542,078

$300 million, 4.625% Senior Notes due 2021
298,679

 
321,633

 
298,396

 
319,620

$300 million, 3.800% Senior Notes due 2022
297,868

 
310,802

 
297,535

 
303,595

$300 million, 3.850% Senior Notes due 2023
298,355

 
307,860

 
$
298,136

 
$
302,468

$500 million, 3.550% Senior Notes due 2026
$
495,359

 
$
498,537

 
 
 
 


The accompanying Consolidated Balance Sheets include other financial instruments, including cash and cash equivalents, accounts receivable, amounts receivable from suppliers and accounts payable. Due to the short-term nature of these financial instruments, the Company believes that the carrying values of these instruments approximate their fair values.