Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 12,529	$ 9,150	$ 26,211	$ 9,510
Other comprehensive income (loss), before tax:
Change in unrealized gains and losses on derivatives	(37)	48	(16)	864
Change in unrealized gains and losses on available-for-sale investments	0	41	16	72
Other comprehensive income (loss), before tax	(37)	89	0	936
Tax benefit (provision) related to derivatives	7	(8)	1	(84)
Tax provision related to available-for-sale investments	0	(10)	(4)	(37)
Other comprehensive income (loss), net of tax	(30)	71	(3)	815
Comprehensive income	12,499	9,221	26,208	10,325
Comprehensive Income (Loss) attributable to Noncontrolling Interest	0	(797)	0	(797)
Comprehensive Income (Loss) attributable to Parent	$ 12,499	$ 10,018	$ 26,208	$ 11,122