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Investments: (Tables)

3 Months Ended

Mar. 26, 2016

Summary of marketable securities classified as available-for-sale securities

	March 26, 2016				December 26, 2015
	Cost		Fair Value		Cost		Fair Value
Equity securities	$	257,300	$	220,100	$	280,600	$	227,800

Schedule of the Company's unrealized gains and losses for marketable securities classified as available-for-sale securities in accumulated other comprehensive loss

	March 26, 2016			December 26, 2015
Unrealized gains	$	—		$	—
Unrealized losses	(37,200		)	(52,800		)

Net unrealized losses	$	(37,200	)	$	(52,800	)

Schedule of the Company's realized gains and losses recognized on sales of available-for-sale marketable securities

	Three Months Ended
	March 26, 2016			March 28, 2015
Realized gains	$	—		$	13,400
Realized losses	(6,200		)	(36,200		)

Net realized losses	$	(6,200	)	$	(22,800	)

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details