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Business Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Segment Reporting Information [Line Items]    
Gross profit $ 56,283 $ 25,126
Selling, general and administrative expenses 61,252 61,837
Acquisition and integration expenses 8,409  
Gain on sales of property and equipment (543) (270)
Total other expense (income) 958 (94)
Loss before benefit from income taxes (13,793) (36,347)
Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Gross profit $ 56,283 $ 25,126