Accumulated Other Comprehensive Income - Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,	$ 1,146,115	$ 1,058,745	$ 1,022,899
Other comprehensive income gain (loss), net of tax	(1,599)	1,806	1,218
Balance,	1,219,742	1,146,115	1,058,745
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,	3,286	1,480	262
Balance,	1,687	3,286	1,480
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,	3,286	1,480
Other comprehensive income (loss)	(1,599)	1,806
Other comprehensive income gain (loss), net of tax	(1,599)	1,806
Balance,	$ 1,687	$ 3,286	$ 1,480