For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
REVENUE (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Total Revenue	$ 180,962	$ 198,692	$ 525,335	$ 634,608
Gross profit	65,911	66,563	180,916	199,048
Bad debt expense	0	$ 6,488	0	$ 19,648
Allowance for doubtful accounts	0		0		$ 37,912
Commercial
Disaggregation of Revenue [Line Items]
Total Revenue	139,077		431,869
Government
Disaggregation of Revenue [Line Items]
Total Revenue	39,498		88,437
Patient
Disaggregation of Revenue [Line Items]
Total Revenue	2,387		5,029
Calculated under Revenue Guidance in Effect before Topic 606
Disaggregation of Revenue [Line Items]
Total Revenue	186,700		541,900
Gross profit	71,600		197,500
Bad debt expense	5,700		16,500
Allowance for doubtful accounts	$ 42,900		$ 42,900
Revenue from Rights Concentration Risk \| Sales Revenue, Net
Disaggregation of Revenue [Line Items]
Percentage of concentration risk			1.00%