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Shareholders' Equity (Deficit): Dividends and Repurchase of Common Stock (Details) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
May. 13, 2015 | Apr. 15, 2015 | Dec. 26, 2015 | Dec. 27, 2014 | Dec. 28, 2013
Repurchase of Common Stock |  |  |  |  |
Aggregate purchase price of shares repurchased (in dollars) |  |  | $ 74,853,700 | $ 11,564,800 | $ 1,854,900
Dividends |  |  |  |  |
Cash dividends declared and paid (in dollars per share) |  |  | $ 0.27 | $ 0.23 | $ 0.19
Aggregate quarterly cash dividends declared and paid |  |  | $ 1,200,000 | $ 1,200,000 | $ 960,000
Special cash dividend approved by Board of Directors (in dollars per share) |  |  |  | $ 5.00 |
Total special dividend in cash |  |  |  | $ 25,800,000 |
Common Stock |  |  |  |  |
Repurchase of Common Stock |  |  |  |  |
Number of shares repurchased |  |  | 881,518 | 166,030 | 28,422
Aggregate purchase price of shares repurchased (in dollars) |  |  | $ 2,010,600 | $ 4,453,400 | $ 1,854,900
Common Stock | Tender Offer |  |  |  |  |
Repurchase of Common Stock |  |  |  |  |
Shares authorized for repurchase |  | 875,000 |  |  |
Purchase Of Stock Price Per Share |  | $ 84.72 |  |  |
Number of shares repurchased | 875,000 |  |  |  |
Aggregate purchase price of shares repurchased (in dollars) | $ 74,300,000 |  |  |  |
Common Stock | Common Stock Repurchase Program |  |  |  |  |
Repurchase of Common Stock |  |  |  |  |
Aggregate purchase price per share of shares repurchased (in dollars per share) |  |  | $ 90.85 | $ 69.65 | $ 65.26
Number of shares repurchased |  |  | 6,518 | 166,030 | 28,422
Aggregate purchase price of shares repurchased (in dollars) |  |  | $ 600,000 | $ 11,600,000 | $ 1,900,000
Number of additional shares that can be repurchased |  |  | 160,182 |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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