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Income Taxes - Deferred Tax Assets and Liabilities Recognized in Company's Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Income Tax Disclosure [Abstract] |  |
Noncurrent deferred tax asset — Other noncurrent assets | $ 2,265 | $ 3,446
Noncurrent deferred tax liabilities — Deferred income taxes | (166,427) | (110,483)
Total deferred tax (liabilities), net of valuation allowances | $ (164,162) | $ (107,037)

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