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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
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.