Geographic and Segment Information - Summary of Revenue Disaggregated Depending on Timing of Revenue Recognition (Detail) - Foundry Services Group [Member] - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended |
|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2018 |
|
| Disaggregation of Revenue [Line Items] | ||
| Total | $ 80,907 | $ 158,336 |
| Transferred at Point in Time [Member] | ||
| Disaggregation of Revenue [Line Items] | ||
| Total | 22,970 | 25,766 |
| Transferred over Time [Member] | ||
| Disaggregation of Revenue [Line Items] | ||
| Total | $ 57,937 | $ 132,570 |