CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net income (loss)	$ 3,744	$ (6,756)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation expense	12,992	11,437
Amortization of intangible assets	3,821	5,245
Amortization of debt issuance costs	421	915
Amortization of favorable and unfavorable leases	(314)	(9)
Deferred income taxes	760	(5,521)
Non-cash stock compensation expense	1,231	1,889
Loss on sale of property, equipment and real estate	107	18
Impairment of assets	0	11,883
Amortization of inventory step-up charges	0	2,884
Amortization of original issue discount	0	62
Gain on insurance proceeds	0	(1,003)
Change in assets and liabilities
Accounts receivable, net of allowances	(29,086)	(25,920)
Inventories, net	(22,030)	(13,042)
Accounts payable	30,868	43,425
Other assets and liabilities	(6,420)	(11,878)
Net cash (used in) provided by operating activities	(3,906)	13,629
Cash flows from investing activities
Purchases of property, equipment and real estate	(10,662)	(5,471)
Purchases of businesses	(6,693)	0
Proceeds from sale of property, equipment and real estate	866	217
Insurance proceeds	0	1,003
Net cash used in investing activities	(16,489)	(4,251)
Cash flows from financing activities
Proceeds from revolving line of credit	175,058	364,270
Repayments of proceeds from revolving line of credit	(155,313)	(364,978)
Principal payments on other notes	(2,557)	(2,043)
Payments on capital leases obligations	(2,667)	(1,933)
Other financing activities, net	1,735	(1,419)
Net cash provided by (used in) financing activities	16,256	(6,103)
Net (decrease) increase in cash and cash equivalents	(4,139)	3,275
Cash and cash equivalents
Beginning of period	8,917	1,089
End of period	4,778	4,364
Non-cash investing and financing transactions
Assets acquired under capital lease obligations	$ 1,765	$ 2,707