Unaudited Condensed Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
Net income	$ 14,705	$ 13,985	$ 29,116	$ 29,328
Other comprehensive income (loss), before tax:
Unrealized gain (loss) on derivative instruments	132	(82)	(73)	69
Unrealized gain (loss) on available-for-sale securities	16	(15)	23	(41)
Other comprehensive income (loss), before tax	148	(97)	(50)	28
Tax (expense) benefit related to items of other comprehensive income	(6)	6	(9)	16
Other comprehensive income (loss), net of tax	142	(91)	(59)	44
Comprehensive income	$ 14,847	$ 13,894	$ 29,057	$ 29,372