Segments (Schedule of net sales, adjusted EBITDA and certain other measures by reportable segment) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales	$ 747,574	$ 821,204	$ 797,547	$ 727,418	$ 510,162	$ 416,471	$ 357,287	$ 292,826	$ 3,093,743	$ 1,576,746	$ 1,311,498
Gross profit	180,727	$ 202,966	$ 191,655	$ 166,617	113,794	$ 97,101	$ 83,818	$ 66,697	741,965	361,410	295,074
Depreciation & amortization									68,680	24,589	15,457
Total assets	1,395,014				1,371,139				1,395,014	1,371,139	581,853
Operating segments [Member] | Geographic divisions [Member]
Segment Reporting Information [Line Items]
Net sales									3,093,743	1,576,746	1,311,498
Gross profit									741,965	361,410	295,074
Depreciation & amortization									66,592	23,726	14,906
Adjusted EBITDA									244,616	122,914	98,933
Total assets	1,345,475				1,305,545				1,345,475	1,305,545	487,027
Other reconciling items [Member] | Other reconciling items [Member]
Segment Reporting Information [Line Items]
Net sales									0	0	0
Gross profit									0	0	0
Depreciation & amortization									2,088	863	551
Adjusted EBITDA									(50,726)	(36,872)	(21,664)
Total assets	$ 49,539				$ 65,594				$ 49,539	$ 65,594	$ 94,826