Consolidated Statements of Cash Flows - USD ($)	3 Months Ended								12 Months Ended			21 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)									$ (79,079,000)	$ 44,713,000	$ (151,710,000)
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation expense									34,283,000	31,825,000	24,997,000
Amortization expense of assets and liabilities, net									2,653,000	1,052,000	570,000
Accretion of asset retirement obligations									62,000	78,000	72,000
Accretion of convertible note discount									5,413,000	5,147,000	4,699,000
Accretion of marketable securities									0	0	189,000
Impairment of property, plant and equipment, net	$ 48,532,000	$ 0	$ 1,341,000	$ 0	$ 17,893,000	$ 0	$ 0	$ 0	49,873,000	17,893,000	0
Provision for doubtful accounts									139,000	630,000	(803,000)
Stock compensation expense									6,909,000	5,896,000	5,161,000
Impairment of goodwill									0	0	175,028,000
Impairment of investment									0	0	1,915,000
Deferred tax expense (benefits)									(30,088,000)	3,009,000	(8,953,000)
Change in fair value of contingent consideration									2,484,000	7,904,000	(359,000)
Gain on involuntary conversion	(4,387,000)	$ (942,000)							(5,329,000)	(9,894,000)	0	$ (8,010,000)
Bargain purchase gain									0	0	(5,358,000)
Change in fair value of convertible debt conversion liability									18,833,000	(13,045,000)	0
Gain on debt extinguishment									0	(2,331,000)	0
Other									247,000	(70,000)	(231,000)
Changes in asset and liabilities, net of effects from mergers and acquisitions:
Accounts receivable									74,609,000	145,068,000	(20,309,000)
Inventories									12,029,000	(58,551,000)	29,631,000
Prepaid expenses and other assets									(12,840,000)	(5,566,000)	16,315,000
Accounts payable									(20,198,000)	(133,139,000)	32,422,000
Accrued expenses and other liabilities									(19,375,000)	7,771,000	(6,769,000)
Deferred revenue									(25,028,000)	26,913,000	(16,347,000)
Net cash flows provided from operating activities									15,597,000	75,303,000	80,160,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash paid for marketable securities									0	0	(52,435,000)
Cash receipts from marketable securities									0	0	68,979,000
Cash paid for purchase of property, plant and equipment									(67,572,000)	(60,705,000)	(64,477,000)
Insurance proceeds for asset impairments									8,000,000	10,949,000	11,027,000
Transfer into restricted cash									0	0	(4,000,000)
Transfer out of restricted cash									4,000,000	1,960,000	15,845,000
Cash paid for investments									(816,000)	(3,249,000)	(1,452,000)
Cash paid for acquisitions and additional interests, net of cash acquired									(3,482,000)	(12,720,000)	(41,409,000)
Net cash flows used in investing activities									(59,870,000)	(63,765,000)	(67,922,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings on line of credit									8,025,000	26,445,000	6,470,000
Borrowing on other lines of credit									8,812,000	10,185,000	0
Repayments on other lines of credits									(4,442,000)	(2,437,000)	0
Cash received for issuance of debt									23,575,000	11,775,000	104,000
Cash received on convertible debt									0	152,000,000	0
Cash paid on debt									(14,950,000)	(74,562,000)	(6,708,000)
Cash paid for debt issuance costs									(1,062,000)	(6,369,000)	(542,000)
Cash received on partial termination of capped call options									0	159,000	0
Cash paid for treasury stock									0	(51,474,000)	(24,350,000)
Cash paid for contingent consideration									(14,659,000)	(7,548,000)	(2,248,000)
Cash paid for conversion of restricted stock units and stock appreciation rights									(1,257,000)	0	0
Net cash flows provided from (used in) financing activities									4,042,000	58,174,000	(27,274,000)
NET CHANGE IN CASH AND CASH EQUIVALENTS									(40,231,000)	69,712,000	(15,036,000)
CASH AND CASH EQUIVALENTS, Beginning of period				$ 116,210,000				$ 47,081,000	116,210,000	47,081,000	63,516,000
Effect of exchange rate changes on cash									1,648,000	(583,000)	(1,399,000)
CASH AND CASH EQUIVALENTS, End of period	77,627,000				116,210,000				77,627,000	116,210,000	47,081,000	116,210,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOWS INFORMATION:
Cash paid (received) for income taxes									252,000	410,000	(189,000)
Cash paid for interest									11,637,000	9,920,000	6,947,000
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Common stock repurchased included in accrued expenses and other liabilities									0		464,000
Amounts included in period-end accounts payable for:
Purchases of property, plant and equipment									7,688,000	3,833,000	7,734,000
Issuance costs									29,000	250,000	84,000
Incentive common stock liability for supply agreement									0		316,000
Issuance of common stock for acquisitions									0	4,050,000	15,310,000
Contingent consideration for acquisitions									0	4,500,000	5,000,000
Debt assumed in acquisition	$ 0				$ 0				0	0	5,225,000	$ 0
Release of restricted cash to pay off the GOZone Bonds									0	101,315,000	0
Repayment of GOZone Bonds									0	100,000,000	0
Non-cash transfer of line of credit to long-term debt									0	4,498,000	0
Non-cash allocation of proceeds from the 2036 Convertible Notes issuance to convertible debt conversion liability									0	40,145,000	0
Non-cash allocation of purchase price between debt and equity related to the repurchase of the 2019 Convertible Notes									0	7,387,000	0
Non-cash reclassification of the 2036 Convertible Notes conversion liability to additional paid in capital, net of tax impact of $18,025									27,908,000	0	0
Non-cash share repurchases from partial capped call termination									0	1,588,000	0
Accruals of insurance proceeds related to impairment of property, plant and equipment									$ 0	$ 313,000	$ 1,414,000