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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Operating activities:    
Net income $ 55,742 $ 19,680
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 25,554 25,777
Amortization of deferred financing costs 2,861 3,146
Impairment of intangible and long-lived assets 60 93
Write-off of net assets due to cessation of Spain operations 70 0
Share-based compensation expense 4,817 4,947
Deferred tax provision 10,331 784
Allowance for doubtful accounts (857) (471)
Reserve for inventory obsolescence 4,962 2,496
Foreign currency exchange rate loss 150 445
Gain on early extinguishment of debt (1,802) 0
Changes in cash due to:    
Receivables 3,490 (155)
Inventories 5,887 (3,296)
Prepaid expenses 4,338 8,919
Accounts payable (19,727) (7,080)
Accrued liabilities (28,575) (22,747)
Deferred revenue 21,847 12,921
Other long term assets and liabilities, net 144 (498)
Income taxes 8,823 1,405
Cash provided by operating activities 98,115 46,366
Investing activities:    
Capital expenditures (5,614) (1,693)
Capitalized software expenditures (13,419) (15,185)
Cash paid for acquisitions 0 (2,898)
Other items, net (86) (88)
Cash used for investing activities (19,119) (19,864)
Financing activities:    
Payments on long-term debt (83,334) (154,823)
Taxes paid related to net share settlement of equity awards (3,648) 0
Excess tax benefit of share-based compensation 0 945
Proceeds from stock options exercised 1,258 10
Payment of dividends 0 (10)
Cash used for financing activities (85,724) (153,878)
Effect of exchange rate changes on cash and cash equivalents 2,557 348
Net decrease in cash and cash equivalents (4,171) (127,028)
Cash and cash equivalents, beginning of period 108,656 241,526
Cash and cash equivalents, end of period $ 104,485 $ 114,498