Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Summary of assets and liabilities measured and recorded at fair value on a recurring basis

The following table summarizes the Company's assets and liabilities measured and recorded at fair value on a recurring basis as of December 31, 2017 and January 1, 2017:

	December 31, 2017						January 1, 2017
(In thousands)	Total		Level 1		Level 2		Total		Level 1		Level 2
Assets
Restricted cash and cash equivalents1:
Money market funds	$	—	$	—	$	—	$	3,002	$	3,002	$	—
Prepaid expenses and other current assets:
Derivative financial instruments (Note 12)	2,579		—		2,579		4,802		—		4,802
Other long-term assets:
Derivative financial instruments (Note 12)	—		—		—		11,429		—		11,429
Total assets	$	2,579	$	—	$	2,579	$	19,233	$	3,002	$	16,231
Liabilities
Accrued liabilities:
Derivative financial instruments (Note 12)	$	1,452	$	—	$	1,452	$	2,023	$	—	$	2,023
Other long-term liabilities:
Derivative financial instruments (Note 12)	1,174		—		1,174		448		—		448
Total liabilities	$	2,626	$	—	$	2,626	$	2,471	$	—	$	2,471

¹  The Company's restricted cash and cash equivalents consist of money market fund instruments and commercial paper that are classified as available-for-sale and are highly liquid investments with original maturities of 90 days or less. The Company's money market fund instruments are categorized within Level 1 of the fair value hierarchy because they are valued using quoted market prices for identical instruments in active markets.