|
Fair Value of Financial Instruments (Details) (USD $)
|
Mar. 29, 2014
|
Dec. 28, 2013
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
$ 42,013,000
|
|
| Asset measured at, fair value |
41,890,000
|
|
|
Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
42,013,000
|
38,917,000
|
| Assets measured at fair value, Unrealized gains |
325,000
|
284,000
|
| Assets measured at fair value, Unrealized losses |
(448,000)
|
(472,000)
|
| Asset measured at, fair value |
41,890,000
|
38,729,000
|
|
Level 1 [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
6,134,000
|
5,914,000
|
| Assets measured at fair value, Unrealized gains |
162,000
|
156,000
|
| Assets measured at fair value, Unrealized losses |
(113,000)
|
(65,000)
|
| Asset measured at, fair value |
6,183,000
|
6,005,000
|
| Liabilities |
|
|
| Liabilities measured at fair value, Adjusted cost |
|
38,000
|
| Liabilities measured at fair value, Unrealized gains |
0
|
0
|
| Liabilities measured at fair value, Unrealized losses |
0
|
0
|
| Liabilities measured at fair value |
50,000
|
38,000
|
| Convertible Debt, Fair Value Disclosures |
50,000
|
|
|
Level 1 [Member] | Phantom stock units [Member] | Recurring [Member]
|
|
|
| Liabilities |
|
|
| Liabilities measured at fair value, Adjusted cost |
|
38,000
|
| Liabilities measured at fair value, Unrealized gains |
0
|
0
|
| Liabilities measured at fair value, Unrealized losses |
0
|
0
|
| Liabilities measured at fair value |
50,000
|
38,000
|
| Convertible Debt, Fair Value Disclosures |
50,000
|
|
|
Level 1 [Member] | Equity securities [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
1,957,000
|
2,049,000
|
| Assets measured at fair value, Unrealized gains |
131,000
|
137,000
|
| Assets measured at fair value, Unrealized losses |
(104,000)
|
(64,000)
|
| Asset measured at, fair value |
1,984,000
|
2,122,000
|
|
Level 1 [Member] | Mutual funds [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
4,177,000
|
3,865,000
|
| Assets measured at fair value, Unrealized gains |
31,000
|
19,000
|
| Assets measured at fair value, Unrealized losses |
(9,000)
|
(1,000)
|
| Asset measured at, fair value |
4,199,000
|
3,883,000
|
|
Level 2 [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
35,879,000
|
33,003,000
|
| Assets measured at fair value, Unrealized gains |
163,000
|
128,000
|
| Assets measured at fair value, Unrealized losses |
(335,000)
|
(407,000)
|
| Asset measured at, fair value |
35,707,000
|
32,724,000
|
|
Level 2 [Member] | Corporate fixed income [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
29,717,000
|
25,240,000
|
| Assets measured at fair value, Unrealized gains |
163,000
|
126,000
|
| Assets measured at fair value, Unrealized losses |
(209,000)
|
(250,000)
|
| Asset measured at, fair value |
29,671,000
|
25,116,000
|
|
Level 2 [Member] | Municipal bonds [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
2,819,000
|
2,775,000
|
| Assets measured at fair value, Unrealized gains |
0
|
1,000
|
| Assets measured at fair value, Unrealized losses |
(32,000)
|
(28,000)
|
| Asset measured at, fair value |
2,787,000
|
2,748,000
|
|
Level 2 [Member] | Certificates of deposit [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
2,383,000
|
4,014,000
|
| Assets measured at fair value, Unrealized gains |
0
|
1,000
|
| Assets measured at fair value, Unrealized losses |
0
|
0
|
| Asset measured at, fair value |
2,383,000
|
4,015,000
|
|
Level 2 [Member] | Asset backed securities [Member] | Recurring [Member]
|
|
|
| Assets |
|
|
| Assets measured at fair value, Adjusted cost |
960,000
|
974,000
|
| Assets measured at fair value, Unrealized gains |
0
|
0
|
| Assets measured at fair value, Unrealized losses |
(94,000)
|
(129,000)
|
| Asset measured at, fair value |
$ 866,000
|
$ 845,000
|