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Supplemental Information to Condensed Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Schedule Of Cash Flow Supplemental [Line Items] |  |  |  |  |
Cash paid for interest |  |  | $ 102,859 | $ 93,907 | $ 98,411
Cash paid (refunds received) for income taxes, net |  |  | (116,916) | 88,670 | 64,199
Cash balance classified as restricted | [1] |  | 13,847 |  |
Noncash investing and financing activities: |  |  |  |  |
Change in accounts payable and accrued expenses for the acquisition of theatre properties and equipment | [2] |  | (13,259) | 22,013 | (5,728)
Theatre properties acquired under finance leases |  |  |  | 21,535 | 18,851
Investment in NCM – receipt of common units (see Note 8) |  | $ 3,620 | 3,620 | 1,552 | 5,012
Dividends accrued on unvested restricted stock unit awards |  |  | (256) | (670) | (624)
Theatre properties acquired as distribution from equity investee (see Note 9) |  |  | 102,719 |  |
NCM |  |  |  |  |
Noncash investing and financing activities: |  |  |  |  |
Interest expense - NCM (see Notes 4 and 7) |  |  | $ (23,595) | $ (28,624) | $ (19,724)
[1] | Funds are held as collateral for letters of credit associated with certain of the Company’s international subsidiary loans. See further discussion at Note 13.
[2] | Additions to theatre properties and equipment included in accounts payable as of December 31, 2019 and 2020 were $37,004 and $14,991, respectively.

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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586 + Details
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