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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 27, 2022
Mar. 28, 2021
Cash flows from operating activities:    
Net income $ 10,519 $ 6,898
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 7,287 6,962
Provision for credit losses 989 207
Stock-based compensation 3,812 3,343
Deferred income taxes 1,258 (5,002)
Non-cash lease expense 3,281 3,920
Other operating activities 2,608 (438)
Changes in operating assets and liabilities:    
Accounts receivable 27,702 18,025
Income tax receivable (1,252) 4,910
Operating lease right-of-use asset 0 3,501
Other assets 4,267 (4,578)
Accounts payable and other accrued expenses (13,257) (9,633)
Accrued wages and benefits (19,031) 4,249
Workers’ compensation claims reserve 168 (1,499)
Operating lease liabilities (3,319) (3,320)
Other liabilities 1,410 338
Net cash provided by operating activities 26,442 27,883
Cash flows from investing activities:    
Capital expenditures (5,779) (10,003)
Purchases of restricted available-for-sale investments 0 (14)
Sales of restricted available-for-sale investments 0 452
Maturities of restricted held-to-maturity investments 6,034 6,371
Net cash provided by (used in) investing activities 255 (3,194)
Cash flows from financing activities:    
Purchases and retirement of common stock (36,326) 0
Net proceeds from employee stock purchase plans 319 255
Common stock repurchases for taxes upon vesting of restricted stock (3,970) (2,555)
Net change in revolving credit facility 4,000 0
Other (72) (94)
Net cash used in financing activities (36,049) (2,394)
Effect of exchange rate changes on cash, cash equivalents and restricted cash (57) 262
Net change in cash, cash equivalents and restricted cash (9,409) 22,557
Cash, cash equivalents and restricted cash, beginning of period 103,185 118,612
Cash, cash equivalents and restricted cash, end of period 93,776 141,169
Supplemental Disclosure of Cash Flow Information [Abstract]    
Interest 193 477
Income taxes 1,878 (20)
Operating lease liabilities 4,093 4,142
Property and equipment purchased but not yet paid 3,159 702
Right-of-use assets obtained in exchange for new operating lease liabilities $ 3,948 $ 1,453