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Segments and Major Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Financial information of business segments |  |  |  |
Revenues | $ 94,720 | $ 76,501 | $ 192,071 | $ 149,183
Segment operating expenses | 44,669 | 33,426 | 86,058 | 64,505
Segment reconciling items | (41,807) | (31,067) | (84,335) | (63,376)
Operating income (loss) | 8,244 | 12,008 | 21,678 | 21,302
Interest and other income (expense), net | (3,132) | (2,025) | (6,184) | (4,924)
Income (Loss) before income taxes | 5,112 | 9,983 | 15,494 | 16,378
MID Segment |  |  |  |
Financial information of business segments |  |  |  |
Revenues | 67,402 | 54,467 | 137,997 | 108,012
Segment operating expenses | 23,801 | 13,229 | 44,056 | 25,272
Segment Operating Income (Loss) | 43,601 | 41,238 | 93,941 | 82,740
RSD Segment |  |  |  |
Financial information of business segments |  |  |  |
Revenues | 23,366 | 16,407 | 46,571 | 30,508
Segment operating expenses | 12,214 | 13,105 | 24,613 | 25,015
Segment Operating Income (Loss) | 11,152 | 3,302 | 21,958 | 5,493
Other |  |  |  |
Financial information of business segments |  |  |  |
Revenues | 3,952 | 5,627 | 7,503 | 10,663
Segment operating expenses | 8,654 | 7,092 | 17,389 | 14,218
Segment Operating Income (Loss) | (4,702) | (1,465) | (9,886) | (3,555)
Operating Segments [Member] |  |  |  |
Financial information of business segments |  |  |  |
Segment Operating Income (Loss) | $ 50,051 | $ 43,075 | $ 106,013 | $ 84,678

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