| Schedule of financial information by reportable segment | 
The following table presents financial information by reportable segment:   
|   |   | Three months ended |   |   | Six months ended |   |  
|   |   | June 30, 2018 |   |   | July 1, 2017 |   |   | June 30, 2018 |   |   | July 1, 2017 |   |  
| Net sales |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Hydraulics |   | $ | 103,634 |   |   | $ | 60,818 |   |   | $ | 166,243 |   |   | $ | 114,940 |   |  
| Electronics |   |   | 32,534 |   |   |   | 28,517 |   |   |   | 67,243 |   |   |   | 55,748 |   |  
|   |   | $ | 136,168 |   |   | $ | 89,335 |   |   | $ | 233,486 |   |   | $ | 170,688 |   |  
| Operating income |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Hydraulics |   | $ | 25,401 |   |   | $ | 16,359 |   |   | $ | 38,844 |   |   | $ | 30,131 |   |  
| Electronics |   |   | 6,532 |   |   |   | 6,419 |   |   |   | 13,639 |   |   |   | 12,655 |   |  
| Corporate and other |   |   | (14,930 | ) |   |   | (2,077 | ) |   |   | (18,226 | ) |   |   | (6,301 | ) |  
|   |   | $ | 17,003 |   |   | $ | 20,701 |   |   | $ | 34,257 |   |   | $ | 36,485 |   |  
| Capital expenditures |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Hydraulics |   | $ | 6,172 |   |   | $ | 1,465 |   |   | $ | 10,149 |   |   | $ | 2,076 |   |  
| Electronics |   |   | 172 |   |   |   | 1,082 |   |   |   | 432 |   |   |   | 1,229 |   |  
|   |   | $ | 6,344 |   |   | $ | 2,547 |   |   | $ | 10,581 |   |   | $ | 3,305 |   |    
|   |   | June 30, 2018 |   |   | December 30, 2017 |   |  
| Total assets |   |   |   |   |   |   |   |   |  
| Hydraulics |   | $ | 722,221 |   |   | $ | 185,300 |   |  
| Electronics |   |   | 267,884 |   |   |   | 274,466 |   |  
| Corporate |   |   | 2,247 |   |   |   | — |   |  
| Total |   | $ | 992,352 |   |   | $ | 459,766 |   |    | 
| Schedule of geographic region information | 
Tangible long-lived assets are shown based on the physical location of the assets and primarily include net property, plant and equipment:   
|   |   | Three months ended |   |   | Six months ended |   |  
|   |   | June 30, 2018 |   |   | July 1, 2017 |   |   | June 30, 2018 |   |   | July 1, 2017 |   |  
| Net sales |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Americas |   | $ | 67,553 |   |   | $ | 52,705 |   |   | $ | 124,024 |   |   | $ | 99,993 |   |  
| Europe/Middle East/Africa |   |   | 43,233 |   |   |   | 19,229 |   |   |   | 65,584 |   |   |   | 39,329 |   |  
| Asia/Pacific |   |   | 25,382 |   |   |   | 17,401 |   |   |   | 43,878 |   |   |   | 31,366 |   |  
| Total |   | $ | 136,168 |   |   | $ | 89,335 |   |   | $ | 233,486 |   |   | $ | 170,688 |   |      
|   |   | June 30, 2018 |   |   | December 30, 2017 |   |  
| Tangible long-lived assets |   |   |   |   |   |   |   |   |  
| Americas |   | $ | 79,188 |   |   | $ | 78,429 |   |  
| Europe/Middle East/Africa |   |   | 25,359 |   |   |   | 7,803 |   |  
| Asia/Pacific |   |   | 9,881 |   |   |   | 5,699 |   |  
| Total |   | $ | 114,428 |   |   | $ | 91,931 |   |    |