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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, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Accounting Policies [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to RCIHH shareholders |  | $ 379 | $ 2,653 | $ 5,505 | $ 2,552 | $ 526 | $ 8,267 | $ (2,841) | $ 3,360 | $ 4,423 | $ 691 | $ 3,722 | $ 2,404 | $ 11,089 | $ 9,312 | $ 11,240
Average number of common shares outstanding |  | 9,839,000 | 9,906,000 | 10,013,000 | 10,296,000 | 10,363,000 | 10,245,000 | 10,275,000 | 10,264,000 | 10,179,000 | 9,883,000 | 9,661,000 | 9,546,000 | 9,941,000 | 10,359,000 | 9,816,000
Basic earnings (loss) per share |  | $ 0.04 | $ 0.27 | $ 0.55 | $ 0.25 | $ 0.05 | $ 0.81 | $ (0.28) | $ 0.33 | $ 0.44 | $ 0.07 | $ 0.39 | $ 0.25 | $ 1.12 | $ 0.90 | $ 1.15
Adustment. to net earnings from assumed conversion of debentures | [1] |  |  |  |  |  |  |  |  |  |  |  |  | $ 153 | $ 29 | $ 821
Adjusted net income attributable to RCIHH shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,242 | $ 9,341 | $ 12,061
Average number of common shares outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,941,000 | 10,359,000 | 9,816,000
Effect of potentially dilutive restricted stock, warrants and options | [2] |  |  |  |  |  |  |  |  |  |  |  |  | 60,000 |  | 9,000
Effect of potentially dilutive convertible debentures | [1] |  |  |  |  |  |  |  |  |  |  |  |  | 228,000 | 47,000 | 812,000
Total average number of common shares outstanding used for dilution |  | 9,840,000 | 10,047,000 | 10,215,000 | 10,635,000 | 10,363,000 | 10,707,000 | 10,275,000 | 10,929,000 | 11,014,000 | 9,968,000 | 10,853,000 | 9,855,000 | 10,229,000 | 10,406,000 | 10,637,000
Diluted earnings per share - Net income attributable to RCIHH shareholders |  | $ 0.04 | $ 0.27 | $ 0.54 | $ 0.25 | $ 0.05 | $ 0.78 | $ (0.28) | $ 0.32 | $ 0.42 | $ 0.07 | $ 0.37 | $ 0.25 | $ 1.10 | $ 0.90 | $ 1.13
[1] | Represents interest expense on dilutive convertible securities that would not occur if they were assumed converted.
[2] | All outstanding warrants and options were considered for the EPS computation.

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