Restructuring and Other Gain - Additional Information (Detail) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | 6 Months Ended | |
|---|---|---|---|---|
Mar. 31, 2017 |
Dec. 31, 2016 |
Mar. 31, 2017 |
Jun. 30, 2017 |
|
| Restructuring Cost and Reserve [Line Items] | ||||
| Restricted cash | $ 18,251 | |||
| Gain on sale of machinery and building as part of restructuring | $ 17,010 | |||
| Sensor Business [Member] | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Proceeds from sale of business | $ 1,295 | |||
| Net gain on sale of business | $ 375 | |||
| Korea [Member] | Buildings [Member] | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Gross proceeds from sale of building | 18,204 | |||
| Value-added tax, for sale of the building | 1,655 | |||
| Restricted cash | 18,204 | |||
| Deposits received | $ 16,549 | |||
| Decrease in restricted cash due to release | $ 18,204 | |||
| Korea [Member] | Buildings [Member] | Restructuring Gain [Member] | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Gain on sale of machinery and building as part of restructuring | $ 16,635 | |||