|
Receivables - Schedule of Receivables (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 27, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Receivables [Abstract] | ||
| Billed receivables | $ 51,848 | $ 41,997 |
| Unbilled contract receivables | 160,473 | 160,735 |
| Receivables | $ 212,321 | $ 202,732 |