Recently Issued Accounting Pronouncements - Impact of Adopting ASU 2017-07 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold	$ 2,735,168	$ 2,001,200	$ 5,013,327	$ 3,419,534
Selling, general and administrative expenses	1,307,861	1,153,779	2,522,426	2,164,800
Other expense (income) - net	$ (1,139)	$ (12,496)	(10,411)	(17,930)
As Previously Reported (Without Adoption of ASU 2017-07)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold				3,416,874
Selling, general and administrative expenses				2,155,667
Other expense (income) - net				(6,137)
Impact of ASU 2017-07
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold			1,489
Selling, general and administrative expenses			5,958
Other expense (income) - net			$ (7,447)
Impact of ASU 2017-07 | Reclass for ASU 2017-07
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold				2,660
Selling, general and administrative expenses				9,133
Other expense (income) - net				$ (11,793)