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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Cash flows from (used for) operating activities:    
Net income $ 23,477 $ 12,496
Adjustments to reconcile net income to net cash from (used for) operating activities -    
Depreciation and amortization 8,885 9,537
Loss on disposition of property and equipment 5 6
Stock-based compensation 1,168 804
Other long-term assets (68) (760)
Other long-term liabilities 2,195 (672)
35,662 21,411
Changes in working capital:    
Accounts receivable (65,899) (56,300)
Inventories (73,519) (8,214)
Prepaid expenses and other 3,391 (90)
Accounts payable 41,184 4,935
Change in outstanding checks (5,318) (559)
Accrued payroll and other accrued liabilities 2,616 334
(97,545) (59,894)
Net cash used for operating activities (61,883) (38,483)
Cash flows from (used for) investing activities:    
Acquisition of net assets (21,907)
Capital expenditures (13,775) (4,469)
Proceeds from disposition of property and equipment 60 85
Net cash used for investing activities (35,622) (4,384)
Cash flows from (used for) financing activities:    
Credit facility revolver borrowings 285,167 221,374
Credit facility revolver repayments (183,728) (175,246)
Principal payment under capital lease obligation (2)
Industrial revenue bond repayments (930) (895)
Credit facility fees and expenses (70) (125)
Proceeds from exercise of stock options (including tax benefits) and employee stock purchases 9
Dividends paid (440) (439)
Net cash from financing activities 99,997 44,678
Net change 2,492 1,811
Beginning balance 3,009 2,315
Ending balance 5,501 4,126
Interest paid 4,306 2,955
Income taxes paid $ 2,055 $ 4,944