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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Cash flows from (used for) operating activities:    
Net income $ 14,776 $ 1,026
Adjustments to reconcile net income to net cash from (used for) operating activities -    
Depreciation and amortization 13,872 14,586
Gain on disposition of property and equipment (38) (161)
Stock-based compensation 944 400
Other long-term assets (1,264) (3,713)
Other long-term liabilities (1,523) 4,192
26,767 16,330
Changes in working capital:    
Accounts receivable (48,790) (18,112)
Inventories (25,697) (24,175)
Prepaid expenses and other 710 1,618
Accounts payable 178 10,913
Change in outstanding checks 553 (1,518)
Accrued payroll and other accrued liabilities (363) 5,256
(73,409) (26,018)
Net cash used for operating activities (46,642) (9,688)
Cash flows from (used for) investing activities:    
Capital expenditures (6,470) (5,335)
Proceeds from disposition of property and equipment 814 161
Net cash used for investing activities (5,656) (5,174)
Cash flows from (used for) financing activities:    
Credit facility revolver borrowings 310,734 230,911
Credit facility revolver repayments (254,925) (213,195)
Industrial revenue bond repayments (895) (865)
Credit facility fees and expenses (125) (125)
Proceeds from exercise of stock options (including tax benefits) and employee stock purchases 9 34
Dividends paid (658) (657)
Net cash from financing activities 54,140 16,103
Net change 1,842 1,241
Beginning balance 2,315 1,604
Ending balance 4,157 2,845
Interest paid 4,691 3,257
Income taxes paid $ 7,918 $ 890