Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from (used for) operating activities:
Net income	$ 35,076	$ 14,776
Adjustments to reconcile net income to net cash from (used for) operating activities -
Depreciation and amortization	13,199	13,872
Loss (gain) on disposition of property and equipment	29	(38)
Stock-based compensation	1,348	944
Other long-term assets	(825)	(1,264)
Other long-term liabilities	3,180	(1,523)
	52,007	26,767
Changes in working capital:
Accounts receivable	(74,076)	(48,790)
Inventories	(76,122)	(25,697)
Prepaid expenses and other	4,176	710
Accounts payable	36,926	178
Change in outstanding checks	(10,039)	553
Accrued payroll and other accrued liabilities	3,995	(363)
	(115,140)	(73,409)
Net cash used for operating activities	(63,133)	(46,642)
Cash flows from (used for) investing activities:
Acquisition of net assets	(21,907)
Capital expenditures	(20,366)	(6,470)
Proceeds from disposition of property and equipment	80	814
Net cash used for investing activities	(42,193)	(5,656)
Cash flows from (used for) financing activities:
Credit facility revolver borrowings	428,782	310,734
Credit facility revolver repayments	(320,534)	(254,925)
Principal payment under capital lease obligation	(4)
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	(660)	(658)
Net cash from financing activities	106,584	54,140
Net change	1,258	1,842
Beginning balance	3,009	2,315
Ending balance	4,267	4,157
Interest paid	7,171	4,691
Income taxes paid	$ 8,216	$ 7,918