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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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