|
Fair Value of Financial Instruments (Details) (USD $)
|
Sep. 28, 2013
|
Dec. 29, 2012
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
$ 41,003,000
|
|
| Asset measured at, fair value |
40,644,000
|
|
|
Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
41,003,000
|
37,866,000
|
| Assets measured at fair value, Unrealized gains |
160,000
|
73,000
|
| Assets measured at fair value, Unrealized losses |
(519,000)
|
(239,000)
|
| Asset measured at, fair value |
40,644,000
|
37,700,000
|
|
Level 1 [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
4,900,000
|
2,538,000
|
| Assets measured at fair value, Unrealized gains |
71,000
|
6,000
|
| Assets measured at fair value, Unrealized losses |
(108,000)
|
(114,000)
|
| Asset measured at, fair value |
4,863,000
|
2,430,000
|
| Liabilities |
|
|
| Liabilities measured at fair value, Adjusted cost |
|
293,000
|
| Liabilities measured at fair value, Unrealized gains |
0
|
0
|
| Liabilities measured at fair value, Unrealized losses |
0
|
0
|
| Liabilities measured at fair value |
79,000
|
293,000
|
| Convertible Debt, Fair Value Disclosures |
79,000
|
|
|
Level 1 [Member] | Deferred director stock units [Member] | Recurring [Member]
|
|
|
| Liabilities |
|
|
| Liabilities measured at fair value, Adjusted cost |
|
263,000
|
| Liabilities measured at fair value, Unrealized gains |
|
0
|
| Liabilities measured at fair value, Unrealized losses |
|
0
|
| Liabilities measured at fair value |
|
263,000
|
|
Level 1 [Member] | Phantom stock units [Member] | Recurring [Member]
|
|
|
| Liabilities |
|
|
| Liabilities measured at fair value, Adjusted cost |
|
30,000
|
| Liabilities measured at fair value, Unrealized gains |
0
|
0
|
| Liabilities measured at fair value, Unrealized losses |
0
|
0
|
| Liabilities measured at fair value |
79,000
|
30,000
|
| Convertible Debt, Fair Value Disclosures |
79,000
|
|
|
Level 1 [Member] | Equity securities [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
1,363,000
|
602,000
|
| Assets measured at fair value, Unrealized gains |
68,000
|
6,000
|
| Assets measured at fair value, Unrealized losses |
(84,000)
|
(86,000)
|
| Asset measured at, fair value |
1,347,000
|
522,000
|
|
Level 1 [Member] | Mutual funds [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
3,537,000
|
1,936,000
|
| Assets measured at fair value, Unrealized gains |
3,000
|
0
|
| Assets measured at fair value, Unrealized losses |
(24,000)
|
(28,000)
|
| Asset measured at, fair value |
3,516,000
|
1,908,000
|
|
Level 2 [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
36,103,000
|
35,328,000
|
| Assets measured at fair value, Unrealized gains |
89,000
|
67,000
|
| Assets measured at fair value, Unrealized losses |
(411,000)
|
(125,000)
|
| Asset measured at, fair value |
35,781,000
|
35,270,000
|
|
Level 2 [Member] | Corporate fixed income [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
23,705,000
|
18,270,000
|
| Assets measured at fair value, Unrealized gains |
86,000
|
48,000
|
| Assets measured at fair value, Unrealized losses |
(299,000)
|
(105,000)
|
| Asset measured at, fair value |
23,492,000
|
18,213,000
|
|
Level 2 [Member] | Government securities [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
|
195,000
|
| Assets measured at fair value, Unrealized gains |
|
14,000
|
| Assets measured at fair value, Unrealized losses |
|
0
|
| Asset measured at, fair value |
|
209,000
|
|
Level 2 [Member] | Municipal bonds [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
3,989,000
|
4,525,000
|
| Assets measured at fair value, Unrealized gains |
2,000
|
4,000
|
| Assets measured at fair value, Unrealized losses |
(27,000)
|
(15,000)
|
| Asset measured at, fair value |
3,964,000
|
4,514,000
|
|
Level 2 [Member] | Certificates of deposit [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
7,403,000
|
10,891,000
|
| Assets measured at fair value, Unrealized gains |
1,000
|
1,000
|
| Assets measured at fair value, Unrealized losses |
0
|
0
|
| Asset measured at, fair value |
7,404,000
|
10,892,000
|
|
Level 2 [Member] | Asset backed securities [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
1,006,000
|
1,447,000
|
| Assets measured at fair value, Unrealized gains |
0
|
0
|
| Assets measured at fair value, Unrealized losses |
(85,000)
|
(5,000)
|
| Asset measured at, fair value |
$ 921,000
|
$ 1,442,000
|