Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment	Jun. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3
Net Sales:
Net sales	$ 213,534	$ 197,514	$ 395,447	$ 370,508
Segment EBIT:
Segment EBIT	24,072	14,041	30,822	16,411
Reconciliation of Segment EBIT to Net Income (Loss):
Retained corporate costs	(8,536)	(5,095)	(15,246)	(12,386)
Reorganization charges	0	2,488	0	2,488
Interest expense	(5,456)	(5,138)	(10,540)	(10,005)
(Provision) benefit for income taxes	(6,092)	(2,152)	(4,009)	1,066
Net income (loss)	3,988	(832)	1,027	(7,402)
Depreciation & Amortization:
Depreciation and amortization	11,240	11,228	23,119	22,383
Capital Expenditures:
Capital Expenditures	10,078	15,096	21,349	27,048
United States & Canada
Net Sales:
Net sales	128,474	121,871	236,415	231,200
Segment EBIT:
Segment EBIT	13,358	15,045	18,082	22,546
Depreciation & Amortization:
Depreciation and amortization	3,052	3,084	6,439	6,166
Capital Expenditures:
Capital Expenditures	5,592	2,457	12,729	4,394
Latin America
Net Sales:
Net sales	40,290	36,503	74,623	67,225
Segment EBIT:
Segment EBIT	7,433	1,907	9,583	(1,172)
Depreciation & Amortization:
Depreciation and amortization	4,494	4,510	9,204	8,907
Capital Expenditures:
Capital Expenditures	2,778	4,482	5,167	11,464
EMEA
Net Sales:
Net sales	38,175	31,054	70,423	56,385
Segment EBIT:
Segment EBIT	2,621	(2,057)	3,626	(2,894)
Depreciation & Amortization:
Depreciation and amortization	1,940	1,848	3,949	3,692
Capital Expenditures:
Capital Expenditures	1,449	7,633	2,743	10,396
Other Segments
Net Sales:
Net sales	6,595	8,086	13,986	15,698
Segment EBIT:
Segment EBIT	660	(854)	(469)	(2,069)
Depreciation & Amortization:
Depreciation and amortization	1,309	1,329	2,623	2,683
Capital Expenditures:
Capital Expenditures	142	255	262	468
Corporate
Depreciation & Amortization:
Depreciation and amortization	445	457	904	935
Capital Expenditures:
Capital Expenditures	$ 117	$ 269	$ 448	$ 326