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Fair Value of Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2018
Fair Value Disclosures [Abstract]  
Schedule of Assets, Liabilities, and Equity Measured at Fair Value on a Recurring Basis
A summary of assets and (liabilities) at June 30, 2018 and December 31, 2017, related to the Company's financial instruments, measured at fair value on a recurring basis, is set forth below:
 
 
 
Fair Value
Financial Instrument
Balance sheet location
 
June 30, 2018
 
December 31, 2017
 
 
 
 
 
 
Money market funds
Cash and cash equivalents
Level I
$
179,442

 
$
177,235

Forward sales commitments
Other current assets
Level II
5

 
9

Forward sales commitments
Accrued liabilities
Level II
(25
)
 
(2
)
Interest rate lock commitments
Other current assets
Level III
120

 
29

Interest rate lock commitments
Accrued liabilities
Level III
(3
)
 
(4
)