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Summary of Significant Accounting Policies (Details) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 28, 2013
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Sep. 28, 2013
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Jun. 29, 2013
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Mar. 30, 2013
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Dec. 29, 2012
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Sep. 29, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 28, 2013
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Dec. 29, 2012
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Dec. 31, 2011
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Reinsurance Purchased For Stop Losses On Individual Basis | $ 155 | ||||||||||
| Computation of basic and diluted earnings per common share | |||||||||||
| Net income | 8,343,000 | 8,275,000 | 11,790,000 | 9,575,000 | 6,693,000 | 8,835,000 | 11,247,000 | 10,623,000 | 37,984,000 | 37,398,000 | 37,677,000 |
| Weighted average basic shares outstanding | 26,206 | 25,944 | 25,642 | ||||||||
| Basic net income per common share (in dollars per share) | $ 0.32 | $ 0.32 | $ 0.45 | $ 0.37 | $ 0.26 | $ 0.34 | $ 0.43 | $ 0.41 | $ 1.45 | $ 1.44 | $ 1.47 |
| Effect of dilutive stock options | 0 | 0 | 0 | ||||||||
| Weighted average diluted shares outstanding | 26,206 | 25,971 | 25,684 | ||||||||
| Diluted net income per common share (in dollars per share) | $ 0.32 | $ 0.32 | $ 0.45 | $ 0.37 | $ 0.26 | $ 0.34 | $ 0.43 | $ 0.41 | $ 1.45 | $ 1.44 | $ 1.47 |
| Reinsurance Purchased For Stop Losses on Aggregate Basis | $ 8,000 | ||||||||||
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Computer Equipment [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 3 years | ||||||||||
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Computer Equipment [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 5 years | ||||||||||
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Machinery and equipment | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 4 years | ||||||||||
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Machinery and equipment | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 12 years | ||||||||||
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Furniture and Fixtures [Member] | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 4 years | ||||||||||
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Furniture and Fixtures [Member] | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 10 years | ||||||||||
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Buildings
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 40 years | ||||||||||
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Leasehold and land improvements | Minimum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 5 years | ||||||||||
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Leasehold and land improvements | Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||
| Estimated useful life | 15 years | ||||||||||