|
Property plant and equipment (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 28, 2013
|
Dec. 29, 2012
|
Dec. 31, 2011
|
|
| Property, Plant and Equipment [Line Items] | |||
| Property, Plant and Equipment, Gross | $ 273,173 | $ 241,024 | |
| Property, Plant and Equipment | 158,073 | 140,579 | |
|
Machinery and Equipment [Member]
|
|||
| Property, Plant and Equipment [Line Items] | |||
| Property, Plant and Equipment, Gross | 174,454 | 153,204 | |
| Property, Plant and Equipment | 93,949 | 83,363 | |
| Inventory, Parts and Components, Net of Reserves | 3,577 | 2,913 | |
| Depreciation | 17,666 | 15,293 | 13,935 |
|
Machinery and Equipment [Member] | Construction in Progress [Member]
|
|||
| Property, Plant and Equipment [Line Items] | |||
| Property, Plant and Equipment, Gross | 10,263 | 13,475 | |
|
Machinery and Equipment [Member] | Capital Lease [Member]
|
|||
| Property, Plant and Equipment [Line Items] | |||
| Property, Plant and Equipment, Gross | 7,807 | 1,132 | |
| Property, Plant and Equipment | $ 7,517 | $ 994 | |