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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 05, 2018 | Apr. 25, 2018 | Jan. 24, 2018 | Nov. 29, 2017 | Apr. 11, 2017 | Nov. 08, 2016 | May 26, 2018 | Nov. 25, 2017 | May 27, 2017 | Nov. 26, 2016 | May 26, 2018 | May 27, 2017
Shareholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | $ 1.4 |  | $ 0.7 |  | $ 5.0 | $ 2.2
Dividends paid per common share (in dollars per share) |  |  | $ 0.10 | $ 0.10 |  |  | $ 0.10 |  | $ 0.10 |  | $ 0.30 | $ 0.30
Dividends declared per common share (in dollars per share) |  | $ 0.10 |  |  |  |  |  |  |  |  |  |
Oct 18 2017 Grant [Member] | Management [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Shareholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of stock (in shares) |  |  |  |  |  |  |  | 62,660 |  |  |  |
Oct 11 2016 Grant [Member] | Management [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Shareholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of stock (in shares) |  |  |  |  |  |  |  |  |  | 97,600 |  |
Grand Design [Member] |  |  |  |  |  |  |  |  |  |  |  |
Shareholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares issued for acquisition |  |  |  |  |  | 4,586,555 |  |  |  |  |  |
Acquisition shares sold |  |  |  |  | 2,293,277 |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Shareholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared per common share (in dollars per share) | $ 0.10 |  |  |  |  |  |  |  |  |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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