|
Fair Value of Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified
|
Dec. 28, 2013
|
Dec. 29, 2012
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
$ 38,917
|
|
| Asset measured at, fair value |
38,729
|
|
|
Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
38,917
|
37,866
|
| Assets measured at fair value, Unrealized gains |
284
|
73
|
| Assets measured at fair value, Unrealized losses |
(472)
|
(239)
|
| Asset measured at, fair value |
38,729
|
37,700
|
|
Level 1 [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
5,914
|
2,538
|
| Assets measured at fair value, Unrealized gains |
156
|
6
|
| Assets measured at fair value, Unrealized losses |
(65)
|
(114)
|
| Asset measured at, fair value |
6,005
|
2,430
|
| Liabilities |
|
|
| Liabilities measured at fair value, Adjusted cost |
|
293
|
| Liabilities measured at fair value, Unrealized gains |
0
|
0
|
| Liabilities measured at fair value, Unrealized losses |
0
|
0
|
| Liabilities measured at fair value |
38
|
293
|
| Convertible Debt, Fair Value Disclosures |
38
|
|
|
Level 1 [Member] | Deferred director stock units [Member] | Recurring [Member]
|
|
|
| Liabilities |
|
|
| Liabilities measured at fair value, Adjusted cost |
|
263
|
| Liabilities measured at fair value, Unrealized gains |
|
0
|
| Liabilities measured at fair value, Unrealized losses |
|
0
|
| Liabilities measured at fair value |
|
263
|
|
Level 1 [Member] | Phantom stock units [Member] | Recurring [Member]
|
|
|
| Liabilities |
|
|
| Liabilities measured at fair value, Adjusted cost |
|
30
|
| Liabilities measured at fair value, Unrealized gains |
0
|
0
|
| Liabilities measured at fair value, Unrealized losses |
0
|
0
|
| Liabilities measured at fair value |
38
|
30
|
| Convertible Debt, Fair Value Disclosures |
38
|
|
|
Level 1 [Member] | Equity securities [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
2,049
|
602
|
| Assets measured at fair value, Unrealized gains |
137
|
6
|
| Assets measured at fair value, Unrealized losses |
(64)
|
(86)
|
| Asset measured at, fair value |
2,122
|
522
|
|
Level 1 [Member] | Mutual funds [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
3,865
|
1,936
|
| Assets measured at fair value, Unrealized gains |
19
|
0
|
| Assets measured at fair value, Unrealized losses |
(1)
|
(28)
|
| Asset measured at, fair value |
3,883
|
1,908
|
|
Level 2 [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
33,003
|
35,328
|
| Assets measured at fair value, Unrealized gains |
128
|
67
|
| Assets measured at fair value, Unrealized losses |
(407)
|
(125)
|
| Asset measured at, fair value |
32,724
|
35,270
|
|
Level 2 [Member] | Corporate fixed income [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
25,240
|
18,270
|
| Assets measured at fair value, Unrealized gains |
126
|
48
|
| Assets measured at fair value, Unrealized losses |
(250)
|
(105)
|
| Asset measured at, fair value |
25,116
|
18,213
|
|
Level 2 [Member] | Government securities [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
|
195
|
| Assets measured at fair value, Unrealized gains |
|
14
|
| Assets measured at fair value, Unrealized losses |
|
0
|
| Asset measured at, fair value |
|
209
|
|
Level 2 [Member] | Municipal bonds [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
2,775
|
4,525
|
| Assets measured at fair value, Unrealized gains |
1
|
4
|
| Assets measured at fair value, Unrealized losses |
(28)
|
(15)
|
| Asset measured at, fair value |
2,748
|
4,514
|
|
Level 2 [Member] | Certificates of deposit [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
4,014
|
10,891
|
| Assets measured at fair value, Unrealized gains |
1
|
1
|
| Assets measured at fair value, Unrealized losses |
0
|
0
|
| Asset measured at, fair value |
4,015
|
10,892
|
|
Level 2 [Member] | Asset backed securities [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
974
|
1,447
|
| Assets measured at fair value, Unrealized gains |
0
|
0
|
| Assets measured at fair value, Unrealized losses |
(129)
|
(5)
|
| Asset measured at, fair value |
$ 845
|
$ 1,442
|