Income Taxes - Deferred Tax Assets and Liabilities Recognized in Company's Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
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)