Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 30, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Accrued compensation and benefits	$ 15,004	$ 17,348
Accrued warranty	5,054	4,835	$ 3,925	$ 3,142
Customer deposits	3,521	3,634
Other	14,663	17,497
Total	$ 38,242	$ 43,314