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Shareholders' Equity (Deficit): Dividends and Repurchase of Common Stock (Details) - USD ($) |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 16, 2017 | Jul. 19, 2017 | May 13, 2015 | Apr. 15, 2015 | Dec. 30, 2017 | Dec. 31, 2016 | Dec. 26, 2015
Repurchase of Common Stock |  |  |  |  |  |  |
Aggregate purchase price of shares repurchased (in dollars) |  |  |  |  | $ 49,902,500 | $ 1,573,900 | $ 74,853,700
Dividends |  |  |  |  |  |  |
Cash dividends declared and paid (in dollars per share) |  |  |  |  | $ 0.43 | $ 0.37 | $ 0.27
Aggregate quarterly cash dividends declared and paid |  |  |  |  | $ 1,765,000 | $ 1,526,800 | $ 1,228,200
Tender Offer |  |  |  |  |  |  |
Repurchase of Common Stock |  |  |  |  |  |  |
Shares authorized for repurchase |  | 400,000 |  | 875,000 |  |  |
Purchase of stock, price per share |  | $ 124.48 |  | $ 84.72 |  |  |
Number of shares repurchased | 400,000 |  | 875,000 |  |  |  |
Aggregate purchase price of shares repurchased (in dollars) | $ 49,900,000 |  | $ 74,300,000 |  |  |  |
Common Stock Repurchase Program |  |  |  |  |  |  |
Repurchase of Common Stock |  |  |  |  |  |  |
Number of shares repurchased |  |  |  |  |  | 17,194 | 6,518
Aggregate purchase price of shares repurchased (in dollars) |  |  |  |  |  | $ 1,600,000 | $ 600,000
Aggregate purchase price per share of shares repurchased (in dollars per share) |  |  |  |  |  | $ 91.54 | $ 90.85
Number of additional shares that can be repurchased |  |  |  |  | 142,988 |  |

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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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