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Segments and Major Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Financial information of business segments
Revenues	$ 97,351	$ 72,682
Segment operating expenses	41,389	31,079
Segment reconciling items	(42,528)	(32,309)
Operating income (loss)	13,434	9,294
Interest and other income (expense), net	(3,052)	(2,899)
Income (Loss) before income taxes	10,382	6,395
MID Segment
Financial information of business segments
Revenues	70,595	53,545
Segment operating expenses	20,255	12,043
Segment Operating Income (Loss)	50,340	41,502
RSD Segment
Financial information of business segments
Revenues	23,205	14,101
Segment operating expenses	12,399	11,910
Segment Operating Income (Loss)	10,806	2,191
Other
Financial information of business segments
Revenues	3,551	5,036
Segment operating expenses	8,735	7,126
Segment Operating Income (Loss)	(5,184)	(2,090)
Operating Segments [Member]
Financial information of business segments
Segment Operating Income (Loss)	$ 55,962	$ 41,603

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Total operating income loss for reporting segments.

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Segment reconciling items

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
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-Name Accounting Standards Codification
-Topic 225
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-Section S99
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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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