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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 29, 2013
Mar. 30, 2012
Cash flows from operating activities:    
Net income (loss) $ (1,076) $ 1,530
Adjustments to reconcile net income (loss) to net cash from operating activities:    
Depreciation and amortization 5,159 4,768
Provision for doubtful accounts 1,652 1,049
Stock-based compensation 2,880 2,902
Deferred income taxes (3,573) (1,006)
Other operating activities 180 (401)
Changes in operating assets and liabilities, net of acquisitions:    
Accounts receivable 4,982 8,441
Income taxes (2,136) 1,037
Other assets 251 1,076
Accounts payable and other accrued expenses (6,990) (2,644)
Accrued wages and benefits 4,061 1,513
Workers’ compensation claims reserve 549 (876)
Other liabilities 158 303
Net cash provided by operating activities 6,097 17,692
Cash flows from investing activities:    
Capital expenditures (3,952) (3,704)
Acquisition of business, net of cash acquired (53,248) 0
Change in restricted cash and cash equivalents (4,489) 3,529
Purchases of restricted investments (1,365) (7,662)
Maturities of restricted investments 4,128 3,907
Net cash used in investing activities (58,926) (3,930)
Cash flows from financing activities:    
Net proceeds from stock option exercises and employee stock purchase plans 2,266 2,894
Common stock repurchases for taxes upon vesting of restricted stock (2,010) (1,807)
Proceeds from note payable 34,000 0
Payments on debt (397) 0
Other 479 637
Net cash provided by financing activities 34,338 1,724
Effect of exchange rates on cash (222) 208
Net change in cash and cash equivalents (18,713) 15,694
CASH AND CASH EQUIVALENTS, beginning of period 129,513 109,311
CASH AND CASH EQUIVALENTS, end of period $ 110,800 $ 125,005