Accrued Expenses And Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 30, 2016
Accounts Payable And Accrued Liabilities Current And Noncurrent [Abstract]
Accrued compensation and benefits	$ 8,002	$ 4,412
Accrued bonuses	1,954	13,038
Accrued dividend payable	4,648	4,023
Deferred revenue	13,292	10,975
Accrued sales, use, franchise and VAT tax	3,107	3,791
Non-cash stock compensation accrual	3,391	4,225
Income tax payable	594	4,437
Other accrued expenses	2,079	1,824
Total accrued expenses and other liabilities	$ 37,067	$ 46,725