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Fair Value Of Assets And Liabilities
3 Months Ended
Mar. 31, 2018
Fair Value Disclosures [Abstract]  
Fair Value Of Assets And Liabilities
We endeavor to utilize the best available information in measuring fair value. Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. The following tables present our assets and liabilities measured at fair value on a recurring basis:
 
Level 1
(in millions)
March 31, 2018
 
December 31, 2017
Cash equivalents and restricted cash
$
31.5

 
$
31.2


Our cash equivalents and restricted cash, which are held in interest-bearing accounts, qualify for Level 1 in the fair value hierarchy which includes unadjusted quoted market prices in active markets for identical assets.
We currently have no other assets or liabilities subject to fair value measurement on a recurring basis. Our 4.75% Senior Notes due 2028 (the "Senior Notes") are disclosed at fair value which is based on unadjusted quoted prices for similar liabilities in markets that are not active. The fair value of the Senior Notes was $470.6 million at March 31, 2018 and $496.8 million at December 31, 2017.
The following methods and assumptions were used in estimating our fair value disclosures for financial instruments:
Cash equivalents: the carrying amount reported in the balance sheet for cash equivalents approximates our fair value due to the short-term maturity of these instruments.
Long-term debt: the carrying amounts of the borrowings under the $700.0 million revolving credit facility and $400.0 million Senior Secured Term Loan B due 2024 (the "2017 Credit Agreement") approximate fair value, based upon current interest rates, representing a Level 2 fair value measurement.
We did not measure any assets at fair value on a non-recurring basis for 2018 or 2017.