Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS

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FAIR VALUE MEASUREMENTS
3 Months Ended
Mar. 31, 2018
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS
FAIR VALUE MEASUREMENTS
The following table shows the fair value of the Company’s significant financial assets that are required to be measured at fair value on a recurring basis, which are classified on the balance sheets as cash and cash equivalents:
 
Fair Value Measurements at
 
March 31, 2018
 
December 31, 2017
 
Level 1
 
(in thousands)
Assets:
 
 
 
       Cash equivalents
$
485,413

 
$
58,063


The Company has cash equivalents which consist of money market funds. Fair values for cash equivalents are based on quoted prices in an active market which are considered to be Level 1 inputs as defined in the FASB guidance.
The Company’s outstanding debt held by third-party financial institutions is carried at cost, adjusted for any discounts or debt issuance costs. The Company’s debt is not publicly traded and the carrying amounts typically approximate fair value for debt that accrues interest at a variable rate, which are considered to be Level 2 inputs as defined in the FASB guidance. The following table presents the estimated fair values of the Company’s senior notes and convertible senior notes at March 31, 2018 and December 31, 2017:


Estimated Fair Value at
 
March 31, 2018
 
December 31, 2017
 
Level 2
 
(in thousands)
4.875% Senior Notes due 2024
$
561,459

 
$
592,325

5.625% Senior Notes due 2026
$
304,389

 
$

5.375% Senior Notes due 2022

$
255,735

 
$
259,233

2.5% Convertible Senior Notes due 2023
$
556,226

 
$

2.5% Convertible Senior Notes due 2019
$
66,052

 
$
310,635


The estimated fair value of the Company’s third-party, fixed-rate debt is based on quoted market prices in active markets for the same or similar debt, which are considered to be Level 2 inputs. The Company had fixed-rate debt held by noncontrolling interest partners with a face value of $45.2 million and $44.0 million at March 31, 2018 and December 31, 2017, respectively. The Company is unable to determine a fair value for this debt.