Equity Compensation - RSU's (Details) - USD ($)	12 Months Ended
Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Equity Compensation
Award vesting period, in years	3 years
Restricted Stock
Equity Compensation
Weighted Average Grant-Date Fair Value, Granted (in dollars per share)	$ 98.05
Restricted Shares, Granted	203,000
Restricted Stock Units
Equity Compensation
Restricted Shares, Granted	11,000	15,000	113,000
Restricted Stock Units \| Minimum
Equity Compensation
Award vesting period, in years	1 year	1 year
Restricted Stock Units \| Maximum
Equity Compensation
Award vesting period, in years	3 years	3 years
Time based restricted stock
Equity Compensation
Award vesting period, in years	3 years	3 years	3 years
Restricted Shares, Granted	130,000	207,000	212,000
Dividends declared to holders of time-based restricted stock (in dollars)	$ 410,000	$ 366,000	$ 310,000
Dividends declared to holders of time-based restricted stock (in dollars per share)	$ 1.15	$ 0.90	$ 0.90
Performance based restricted stock units
Equity Compensation
Risk-free interest rate (as a percent)	0.20%	0.90%	2.50%
Expected volatility (as a percent)	48.30%	36.30%	33.90%
Award vesting period, in years	3 years
Weighted Average Grant-Date Fair Value, Granted (in dollars per share)	$ 103.14	$ 59.52	$ 44.95
Performance based restricted stock units \| Executive Manager
Equity Compensation
Restricted Shares, Granted	61,000	92,000	89,000

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Amount of paid and unpaid cash, stock, and paid-in-kind dividends declared for award under share-based payment arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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