Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 30, 2018
Operating lease right-of-use assets	$ 102,583	$ 0
Current portion of operating lease liabilities	13,415	0
Long-term operating lease liabilities	96,248	$ 0
Total operating lease liabilities	$ 109,663
Weighted-average remaining lease term	9 years
Weighted-average discount rate	10.67%
Operating cash flows for operating leases	$ 6,317
Right-of-use assets obtained in exchange for lease obligations, operating leases	106,681
Operating lease costs related to right-of-use assets	5,889
Other operating lease costs	2,740
Sublease income	(524)
Total lease cost	$ 8,105