Segments and Major Customers (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financial information of business segments
Revenues	$ 89,855	$ 73,779	$ 239,038	$ 219,505
Segment operating expenses	39,393	27,663	103,898	82,678
Segment reconciling items	(38,646)	(28,476)	(102,022)	(85,741)
Operating income (loss)	11,816	17,640	33,118	51,086
Interest and other income (expense), net	(3,051)	(2,578)	(7,975)	(8,417)
Income (Loss) before income taxes	8,765	15,062	25,143	42,669
MID Segment
Financial information of business segments
Revenues	63,142	55,383	171,154	164,696
Segment operating expenses	20,060	11,734	44,797	36,055
Segment Operating Income (Loss)	43,082	43,649	126,357	128,641
RSD Segment
Financial information of business segments
Revenues	22,532	12,246	53,040	36,849
Segment operating expenses	12,493	6,653	37,507	21,317
Segment Operating Income (Loss)	10,039	5,593	15,533	15,532
Other
Financial information of business segments
Revenues	4,181	6,150	14,844	17,960
Segment operating expenses	6,840	9,276	21,594	25,306
Segment Operating Income (Loss)	(2,659)	(3,126)	(6,750)	(7,346)
Operating Segments [Member]
Financial information of business segments
Segment Operating Income (Loss)	$ 50,462	$ 46,116	$ 135,140	$ 136,827

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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.

+ References

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
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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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-Publisher FASB
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The net result for the period of deducting operating expenses from operating revenues.

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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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