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Summary of Significant Accounting Policies - Schedule of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Sep. 30, 2019 | [1] | Jun. 30, 2019 | [1] | Mar. 31, 2019 | [1] | Dec. 31, 2018 | [1] | Sep. 30, 2018 | Jun. 30, 2018 | [2] | Mar. 31, 2018 | [2] | Dec. 31, 2017 | [2] | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Accounting Policies [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to RCIHH shareholders - basic |  | $ 458 | $ 5,638 | $ 6,735 | $ 6,344 | $ (3,506) | [2] | $ 5,389 | $ 4,685 | $ 14,311 | $ (2,239) | [3] | $ 3,841 | [3] | $ 3,759 | [3] | $ 2,898 | [3] | $ 19,175 | $ 20,879 | $ 8,259
Adjustment to net income from assumed conversion of debentures | [4] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5
Adjusted net income attributable to RCIHH shareholders - diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 19,175 | $ 20,879 | $ 8,264
Weighted average number of common shares outstanding - basic |  |  |  |  |  |  |  |  |  |  | 9,719 |  | 9,719 |  | 9,719 |  | 9,768 |  | 9,657,000 | 9,719,000 | 9,731,000
Effect of potentially dilutive convertible debentures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,000
Adjusted weighted average number of common shares outstanding - diluted |  |  |  |  |  |  |  |  |  |  | 9,719 |  | 9,719 |  | 9,721 |  | 9,814 |  | 9,657,000 | 9,719,000 | 9,743,000
Basic earnings per share |  |  |  |  |  | $ (0.36) |  |  |  |  | $ (0.23) | [3] | $ 0.40 | [3] | $ 0.39 | [3] | $ 0.30 | [3] | $ 1.99 | $ 2.15 | $ 0.85
Diluted earnings per share |  |  |  |  |  | $ (0.36) |  |  |  |  | $ (0.23) | [3] | $ 0.40 | [3] | $ 0.39 | [3] | $ 0.30 | [3] | $ 1.99 | $ 2.15 | $ 0.85
[1] | Fiscal year 2019 income from operations, net income attributable to RCIHH shareholders, and earnings per share included the impact of a $6.0 million in asset impairments in the fourth quarter, a $2.9 million net gain on sale of businesses and assets ($1.2 million in the first quarter, $1.1 million in the second quarter, $0.3 million in the third quarter and $0.4 million in the fourth quarter), and a $0.8 million net gain on insurance ($0.1 million net loss in the third quarter and $0.9 million net gain in the fourth quarter). Quarterly effective income tax expense (benefit) rate was 22.0%, 22.3%, 24.1%, and (371.7%) from first to fourth quarter, respectively.
[2] | Fiscal year 2018 income from operations, net income attributable to RCIHH shareholders, and earnings per share included the impact of a $1.6 million loss on disposition in the second quarter, a $5.6 million in asset impairments ($1.6 million in the second quarter and $4.0 million in the fourth quarter), and a $8.8 million deferred income tax benefit related to the revaluation of deferred tax assets and liabilities ($9.7 million credit in the first quarter $38,000 expense in the second quarter, and $827,000 expense in the fourth quarter). Quarterly effective income tax expense (benefit) rate was (134.3%), 24.2%, 25.3%, and 103.8% from first to fourth quarter, respectively. See Note 3 related to revision of prior year immaterial misstatement.
[3] | Fiscal year 2017 income from operations, net income attributable to RCIHH shareholders, and earnings per share included the impact of $7.6 million in asset impairment ($1.4 million in the third quarter and $6.2 in the fourth quarter) and $1.3 million additional income tax expense due to change in deferred tax liability rate in the fourth quarter. Quarterly effective income tax expense rate was 33.3%, 33.7%, 32.9%, and 99.6% from first to fourth quarter, respectively.
[4] | Represents interest expense on dilutive convertible securities that would not occur if they were assumed converted.

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