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New Accounting Pronouncements - Summary of Cumulative Effects of Changes in Consolidated Balance Sheet for Adoption of ASU 2016-02 (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Other current assets | $ 42,726 |  | $ 54,363
Assets held for sale |  |  | 69,699
Operating lease right-of-use assets | 11,587 |  |
Liabilities held for sale |  |  | 13,062
Deferred income tax liabilities | 1,357 |  | 1,177
Non-current lease liabilities | 6,751 |  |
Accumulated earnings | $ 401,732 |  | $ 363,965
ASU 2016-02 |  |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Other current assets |  | $ 54,289 |
Assets held for sale |  | 73,826 |
Operating lease right-of-use assets |  | 13,019 |
Liabilities held for sale |  | 17,198 |
Deferred income tax liabilities |  | 1,291 |
Non-current lease liabilities |  | 12,561 |
Accumulated earnings |  | 364,226 |
Adjustments Due to Adoption of ASU 2016-02 | ASU 2016-02 |  |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Other current assets |  | (74) |
Assets held for sale |  | 4,127 |
Operating lease right-of-use assets |  | 13,019 |
Liabilities held for sale |  | 4,136 |
Deferred income tax liabilities |  | 114 |
Non-current lease liabilities |  | 12,561 |
Accumulated earnings |  | $ 261 |

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