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Segment Information - Reconciliation of Adjusted Earnings before Interest, Taxes, Depreciation, and Amortization from Segments to Consolidated (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Adjusted EBITDA $ (2,159) $ 1,536
Interest income, net 944 398
Depreciation and amortization (28,300) (31,099)
Income tax (expense) benefit (6,375) 9,118
Gain (loss) on disposal of assets (235) 1,472
Foreign currency gain 1,704 746
TRA related adjustments (2,941) 0
Charges and credits (4,711) (8,834)
Net loss (42,073) (26,663)
Equity-based compensation expense 2,280 5,701
Merger and acquisition expense 58 449
Severance and other charges 1,254 1,037
Unrealized and realized losses 400 608
Investigation-related matters $ 719 $ 1,039