EQUITY AND STOCK-BASED COMPENSATION - Income (Loss) Per Share (Details) - shares
shares in Thousands |
|
3 Months Ended |
9 Months Ended |
Sep. 26, 2015 |
Oct. 01, 2016 |
Sep. 26, 2015 |
Oct. 01, 2016 |
Sep. 26, 2015 |
| Equity [Abstract] |
|
|
|
|
|
| Common shares distributed to SPX shareholders (in shares) |
41,322
|
|
|
|
|
| Weighted Average Number of Shares Outstanding, Diluted [Abstract] |
|
|
|
|
|
| Weighted-average shares outstanding, basic (in shares) |
|
41,383
|
40,809
|
41,307
|
40,809
|
| Dilutive effect of share-based awards (in shares) |
|
0
|
0
|
0
|
123
|
| Weighted-average shares outstanding, dilutive (in shares) |
|
41,383
|
40,809
|
41,307
|
40,932
|
| Restricted stock shares/Restricted stock units/Stock options |
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
|
|
| Securities not included in computation of diluted income per share (in shares) |
|
747
|
998
|
796
|
|
| Restricted stock shares/Restricted stock units |
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
|
|
| Securities not included in computation of diluted income per share (in shares) |
|
119
|
|
290
|
479
|
| Stock options |
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
|
|
| Securities not included in computation of diluted income per share (in shares) |
|
|
|
|
396
|