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Fair value of financial instruments
9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]  
Fair value of financial instruments
Fair values of financial instruments
The Company measures the fair value of certain assets, liabilities and noncontrolling interests subject to put provisions (temporary equity) based upon certain valuation techniques that include observable or unobservable inputs and assumptions that market participants would use in pricing these assets, liabilities, temporary equity and commitments. The Company has also classified certain assets, liabilities and temporary equity that are measured at fair value into the appropriate fair value hierarchy levels as defined by the FASB.
The following table summarizes the Company’s assets, liabilities and temporary equity that are measured at fair value on a recurring basis as of September 30, 2018
 
Total
 
Quoted prices in
active markets for
identical assets
(Level 1)
 
Significant other
observable inputs
(Level 2)
 
Significant
unobservable
inputs
(Level 3)
Assets
 

 
 

 
 

 
 

Investments in mutual funds and common stock
$
37,547

 
$
37,547

 
$

 
$

Interest rate cap agreements
$
2,135

 
$

 
$
2,135

 
$

Liabilities
 
 
 

 
 

 
 

Contingent earn-out obligations
$
7,233

 
$

 
$

 
$
7,233

Temporary equity
 

 
 

 
 

 
 

Noncontrolling interests subject to put provisions
$
1,064,412

 
$

 
$

 
$
1,064,412


 
Investments in mutual funds and common stock represent equity securities that are recorded at estimated fair value based upon quoted redemption prices reported by each mutual fund. See Note 5 to these condensed consolidated financial statements for further discussion.
Interest rate cap agreements are recorded at fair value estimated from valuation models utilizing the income approach and commonly accepted valuation techniques that use inputs from closing prices for similar assets and liabilities in active markets as well as other relevant observable market inputs at quoted intervals such as current interest rates, forward yield curves, implied volatility and credit default swap pricing. The Company does not believe the ultimate amount that could be realized upon settlement of these interest rate cap agreements would be materially different from the fair value estimates currently reported. See Note 9 to these condensed consolidated financial statements for further discussion.
The estimated fair value of contingent earn-out obligations are primarily based on unobservable inputs including projected EBITDA. The estimated fair value of these contingent earn-out obligations is remeasured as of each reporting date and could fluctuate based upon any significant changes in key assumptions, such as changes in the Company credit risk-adjusted rate that is used to discount the obligations to present value. See Note 15 to these condensed consolidated financial statements for further discussion.
See Note 11 to these condensed consolidated financial statements for a discussion of the Company’s methodology for estimating the fair value of noncontrolling interests subject to put obligations.
The carrying amount of the Company’s senior secured credit facilities totaled $5,302,569, including a discount of $6,724 and deferred financing costs of $11,957 as of September 30, 2018, and their fair value was approximately $5,353,109 based upon quoted market prices for similar instruments, a level 2 input.
The carrying amount of the Company’s senior notes was $4,465,057, including deferred financing costs of $34,943 as of September 30, 2018 and their fair value was approximately $4,404,175, based upon quoted market prices for similar instruments, a level 2 input.
Other financial instruments consist primarily of cash and cash equivalents, accounts receivable, accounts payable, other accrued liabilities and other debt. The balances of the Company's financial instruments other than the senior secured credit facilities and the senior notes are presented in the condensed consolidated financial statements at September 30, 2018 at their approximate fair values due to the short-term nature of their settlements.