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Investments (Available For Sale Securities) (Details) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost, Total	$ 83,545	$ 65,759
Gross Unrealized Holding Gains	8,150	8,296
Gross Unrealized Holding Losses	(66)	(96)
Fair Value	91,629	73,959
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost, Total	1,198	1,198
Gross Unrealized Holding Gains	6,682	6,683
Gross Unrealized Holding Losses	0	0
Fair Value	7,880	7,881
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost, Total	82,347	64,561
Gross Unrealized Holding Gains	1,468	1,613
Gross Unrealized Holding Losses	(66)	(96)
Fair Value	$ 83,749	$ 66,078

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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