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Summary of Activity for Each of Company's Other Investments (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Schedule Of Equity Method Investments [Line Items] |  |  |
Investments, beginning balance |  | $ 156,766 |
Cash distributions received | [1] | (14,342) | $ (12,323)
Equity in income |  | 10,404 | 8,636
Other comprehensive income (loss) in equity method investments |  | (71) | $ 136
Investments, ending balance |  | 157,458 |
Other Affiliates |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Investments, beginning balance |  | 156,766 |
Cash distributions received |  | (5,218) |
Equity in income |  | 6,010 |
Other comprehensive income (loss) in equity method investments |  | (71) |
Other |  | (29) |
Investments, ending balance |  | 157,458 |
Other Affiliates | Digital Cinema Implementation Partners |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Investments, beginning balance |  | 125,252 |
Cash distributions received |  | (5,218) |
Equity in income |  | 4,329 |
Other comprehensive income (loss) in equity method investments |  | (71) |
Other |  | 0 |
Investments, ending balance |  | 124,292 |
Other Affiliates | AC JV, LLC |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Investments, beginning balance |  | 5,266 |
Cash distributions received |  | 0 |
Equity in income |  | 1,678 |
Other comprehensive income (loss) in equity method investments |  | 0 |
Other |  | 0 |
Investments, ending balance |  | 6,944 |
Other Affiliates | Digital Cinema Distribution Coalition |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Investments, beginning balance |  | 2,255 |
Cash distributions received |  | 0 |
Equity in income |  | 0 |
Other comprehensive income (loss) in equity method investments |  | 0 |
Other |  | 0 |
Investments, ending balance |  | 2,255 |
Other Affiliates | FE Concepts, LLC |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Investments, beginning balance |  | 19,918 |
Cash distributions received |  | 0 |
Equity in income |  | 3 |
Other comprehensive income (loss) in equity method investments |  | 0 |
Other |  | 0 |
Investments, ending balance |  | 19,921 |
Other Affiliates | Other Investments |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Investments, beginning balance |  | 4,075 |
Cash distributions received |  | 0 |
Equity in income |  | 0 |
Other comprehensive income (loss) in equity method investments |  | 0 |
Other |  | (29) |
Investments, ending balance |  | $ 4,046 |
[1] | Includes cash distributions received from equity investees that were recorded as a reduction of the respective investment balances (see Notes 8 and 9). These distributions are reported entirely within the U.S. operating segment.

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