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Non-controlling Interests (Summary Of Changes In Controlling And Non-controlling Stockholders’ Equity) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | $ (8,428) | $ (8,684) | $ (4,790) | $ 6,066 | $ 17,728 | $ 32,996 | $ (4,790) | $ 32,996
Net income (loss) | (4,305) | (2,804) | (4,947) | (7,139) | (13,001) | (13,403) | (12,057) | (33,543)
Other comprehensive income, net | (613) | 2,712 | 453 | 1,499 | 887 | (2,541) |  |
Share-based compensation expense | 391 | 530 | 600 | 603 | 456 | 678 |  |
Restricted Stock Units |  | (182) |  |  | (4) | (2) |  |
Distributions to noncontrolling stockholders | (57) |  |  |  |  |  |  |
Balance | (13,012) | (8,428) | (8,684) | 1,029 | 6,066 | 17,728 | (13,012) | 1,029
Additional Paid-In Capital [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | 158,696 | 158,351 | 157,751 | 156,529 | 156,078 | 155,402 | 157,751 | 155,402
Share-based compensation expense | 391 | 530 | 600 | 603 | 456 | 678 |  |
Restricted Stock Units |  | (185) |  |  | (5) | (2) |  |
Distributions to noncontrolling stockholders | 0 |  |  |  |  |  |  |
Balance | 159,087 | 158,696 | 158,351 | 157,132 | 156,529 | 156,078 | 159,087 | 157,132
Retained Earnings (Accumulated Deficit) [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | (122,213) | (119,546) | (114,790) | (105,523) | (92,717) | (79,489) | (114,790) | (79,489)
Net income (loss) | (4,157) | (2,667) | (4,756) | (7,028) | (12,806) | (13,228) |  |
Balance | (126,370) | (122,213) | (119,546) | (112,551) | (105,523) | (92,717) | (126,370) | (112,551)
Treasury Shares [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | (40,407) | (40,407) | (40,407) | (40,407) | (40,407) | (40,407) | (40,407) | (40,407)
Balance | (40,407) | (40,407) | (40,407) | (40,407) | (40,407) | (40,407) | (40,407) | (40,407)
Accumulated Other Comprehensive Income/(Loss) [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | (4,017) | (6,721) | (7,173) | (4,325) | (5,211) | (2,673) | (7,173) | (2,673)
Other comprehensive income, net | (613) | 2,704 | 452 | 1,494 | 886 | (2,538) | 2,543 |
Balance | (4,630) | (4,017) | (6,721) | (2,831) | (4,325) | (5,211) | (4,630) | (2,831)
Reading International Inc. Stockholders' Equity [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | (7,683) | (8,068) | (4,364) | 6,529 | 17,997 | 33,087 | (4,364) | 33,087
Net income (loss) | (4,157) | (2,667) | (4,756) | (7,028) | (12,806) | (13,228) |  |
Other comprehensive income, net | (613) | 2,704 | 452 | 1,494 | 886 | (2,538) |  |
Share-based compensation expense | 391 | 530 | 600 | 603 | 456 | 678 |  |
Restricted Stock Units |  | (182) |  |  | (4) | (2) |  |
Balance | (12,062) | (7,683) | (8,068) | 1,598 | 6,529 | 17,997 | (12,062) | 1,598
Noncontrolling Interests [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | (745) | (616) | (426) | (463) | (269) | (91) | (426) | (91)
Net income (loss) | (148) | (137) | (191) | (111) | (195) | (175) |  |
Other comprehensive income, net |  | 8 | 1 | 5 | 1 | (3) |  |
Distributions to noncontrolling stockholders | (57) |  |  |  |  |  |  |
Balance | $ (950) | (745) | $ (616) | (569) | (463) | (269) | $ (950) | (569)
Class A [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance, shares |  |  | 20,745,594 |  |  |  | 20,745,594 |
Balance, shares | 21,036,670 |  |  |  |  |  | 21,036,670 |
Class A [Member] | Common Stock Shares Outstanding [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | $ 241 | $ 238 | $ 238 | $ 238 | $ 237 | $ 237 | $ 238 | $ 237
Balance, shares | 21,034,000 | 20,743,000 | 20,743,000 | 20,743,000 | 20,673,000 | 20,664,000 | 20,743,000 | 20,664,000
Restricted Stock Units |  | $ 3 |  |  | $ 1 |  |  |
Restricted Stock Units, shares |  | 291,000 |  |  | 70,000 | 9,000 |  |
Balance | $ 241 | $ 241 | $ 238 | $ 238 | $ 238 | $ 237 | $ 241 | $ 238
Balance, shares | 21,034,000 | 21,034,000 | 20,743,000 | 20,743,000 | 20,743,000 | 20,673,000 | 21,034,000 | 20,743,000
Class B [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance, shares |  |  | 1,680,590 |  |  |  | 1,680,590 |
Balance, shares | 1,680,590 |  |  |  |  |  | 1,680,590 |
Class B [Member] | Common Stock Shares Outstanding [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Balance | $ 17 | $ 17 | $ 17 | $ 17 | $ 17 | $ 17 | $ 17 | $ 17
Balance, shares | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000
Balance | $ 17 | $ 17 | $ 17 | $ 17 | $ 17 | $ 17 | $ 17 | $ 17
Balance, shares | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000 | 1,681,000

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