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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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Description of Business and Basis of Presentation (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2019 USD ($) market	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Jan. 01, 2017 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to research and development		$ (21,774)	$ (24,495)
Increase to selling, general and administrative		300,982	302,810
Retained earnings		(5,267,615)		$ (5,279,682)
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings					$ 137,000
Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to research and development			6,000
Increase to selling, general and administrative			6,000
Business services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales		327,046	294,379
Business services \| Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales			(3,000)
Business services \| Income Statement Adjustment \| Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales			(1,000)
Equipment sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales		63,665	62,469
Equipment sales \| Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales			3,000
Rentals
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales		9,715	12,748
Rentals \| Income Statement Adjustment \| Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales			(1,000)
Support services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales		$ 41,779	46,065
Support services \| Income Statement Adjustment \| Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) to cost of products and sales			$ 2,000
Disposed of by Sale
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of smaller markets sold \| market	6
Pre-tax loss	$ 18,000