Recently Issued Accounting Pronouncements - Impact of Adopting ASU 2017-07 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold	$ 2,278,159	$ 1,418,334
Selling, general and administrative expenses	1,214,565	1,011,021
Other expense (income) - net	(9,272)	(5,434)
Reclass of Amortization to Stand-Alone Caption (Unrelated to ASU 2017-07)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold		(134)
Selling, general and administrative expenses		(6,036)
As Previously Reported (Without Adoption of ASU 2017-07)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold		1,418,247
Selling, general and administrative expenses		1,016,211
Other expense (income) - net		(4,367)
Impact of ASU 2017-07
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold	709
Selling, general and administrative expenses	2,835
Other expense (income) - net	$ (3,544)
Impact of ASU 2017-07 | Reclass for ASU 2017-07
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold		221
Selling, general and administrative expenses		846
Other expense (income) - net		$ (1,067)