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 loss	$ (15,914)	$ (6,888)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation expense	8,423	7,674
Amortization expense of assets and liabilities, net	440	161
Gain on involuntary conversion	0	(3,543)
Accretion of convertible note discount	1,338	1,203
Change in fair value of contingent consideration	589	(15)
Change in fair value of convertible debt conversion liability	172	0
Provision for doubtful accounts	255	(160)
Stock compensation expense	1,308	1,076
Deferred tax expense	650	684
Other operating activities	222	(116)
Changes in asset and liabilities, net of effects from acquisitions:
Accounts receivable, net	106,094	204,232
Inventories	(24,195)	(45,789)
Prepaid expenses and other assets	(13,022)	(10,817)
Accounts payable	(29,173)	18,128
Accrued expenses and other liabilities	(6,907)	(2,514)
Deferred revenue	(8,304)	(30)
Net cash flows provided by operating activities	21,976	163,286
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash receipts for involuntary conversion	0	3,543
Cash receipts of restricted cash	1,500	0
Cash paid for purchase of property, plant and equipment	(16,636)	(14,770)
Cash paid for acquisitions and additional interests, net of cash acquired	(3,291)	(12,720)
Cash paid for investments	(816)	(3,249)
Net cash flows used in investing activities	(19,243)	(27,196)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net repayments on revolving line of credit	(31,853)	(23,149)
Borrowings on other lines of credit	2,671	2,820
Repayments on other lines of credit	(1,100)	0
Cash received from notes payable	0	7,537
Cash paid on notes payable	(2,254)	(1,312)
Cash paid for debt issuance costs	(434)	(112)
Cash paid for treasury stock	0	(4,873)
Cash paid for contingent consideration settlement	(3,980)	(581)
Net cash flows used in financing activities	(36,950)	(19,670)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(34,217)	116,420
CASH AND CASH EQUIVALENTS, Beginning of period	116,210	47,081
Effect of exchange rate changes on cash	242	551
CASH AND CASH EQUIVALENTS, End of period	82,235	164,052
SUPPLEMENTAL DISCLOSURES OF CASH FLOWS INFORMATION:
Cash paid for income taxes	14	122
Cash paid for interest	715	1,027
Amounts included in period-end accounts payable for:
Purchases of property, plant and equipment	3,484	6,224
Debt issuance cost	45	50
Treasury stock	0	944
Issuance of common stock for acquisitions		4,050
Contingent consideration for acquisitions	0	4,500
Accruals of insurance proceeds related to impairment of property, plant and equipment	$ 0	$ 1,414