Consolidated Statements of Cash Flows (unaudited) - USD ($)	3 Months Ended
	Mar. 28, 2017	Mar. 29, 2016
Cash flows from operations:
Net income	$ 42,168,000	$ 34,998,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	40,555,000	36,257,000
Stock-based compensation expense	3,840,000	4,322,000
Tax benefit from stock-based compensation	0	(70,000)
Deferred income taxes	7,034,000	34,000
Other	5,617,000	4,517,000
Changes in operating assets and liabilities, excluding the effect of acquisitions and dispositions:
Trade and other accounts receivable, net	41,553,000	32,642,000
Inventories	1,730,000	1,322,000
Prepaid expenses and other	2,200,000	3,738,000
Deposits and other	97,000	521,000
Accounts payable	7,806,000	566,000
Accrued expenses	(73,883,000)	(34,497,000)
Deferred rent	189,000	245,000
Other long-term liabilities	(3,145,000)	(1,982,000)
Net cash provided by operating activities	75,761,000	82,613,000
Cash flows from investing activities:
Additions to property and equipment	(42,329,000)	(50,573,000)
Proceeds from (Repayments of) Notes Payable	216,000	0
Proceeds from sale-leaseback transactions	8,854,000	2,998,000
Net cash used in investing activities	(33,259,000)	(47,575,000)
Cash flows from financing activities:
Repayments of borrowings under revolving credit facility	(40,000,000)	0
Repayments of Long-term Debt	(3,750,000)	(3,797,000)
Proceeds from issuance of long-term debt	99,475,000	0
Repurchases of common stock	(51,124,000)	(113,985,000)
Capitalized debt issuance costs	(150,000)	0
Tax benefit from stock-based compensation	0	70,000
Proceeds from issuance of common stock under employee benefit plans	873,000	773,000
Net cash (used in) provided by financing activities	5,324,000	(116,939,000)
Net decrease in cash and cash equivalents	47,826,000	(81,901,000)
Cash and cash equivalents at beginning of period	105,529,000	241,886,000
Cash and cash equivalents at end of period	$ 153,355,000	$ 159,985,000