Segments and Geographic Information (Reconciliation of Segment EBIT to Net Income) (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2018 USD ($) segment	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment		3
Net Sales:
Net sales		$ 801,093	$ 785,156
Segment EBIT:
Segment EBIT		58,495	52,117
Reconciliation of Segment EBIT to Net Loss:
Retained corporate costs		(31,878)	(27,099)
Goodwill impairment (note 4)		0	(79,700)
Fees associated with strategic initiative (1)	[1]	(2,341)	0
Reorganization charges		0	(2,488)
Interest expense		(21,979)	(20,400)
Provision for income taxes		(10,253)	(15,798)
Net loss		(7,956)	(93,368)
Depreciation & Amortization:
Depreciation and amortization		44,333	45,544
Capital Expenditures:
Capital Expenditures		45,087	47,628
Segment Assets:
Accounts Receivable, Net and Inventory, Net		276,080	277,883
U.S. & Canada
Segment EBIT:
Segment EBIT		36,805	48,044
Depreciation & Amortization:
Depreciation and amortization		13,358	12,665
Capital Expenditures:
Capital Expenditures		22,203	10,056
Segment Assets:
Accounts Receivable, Net and Inventory, Net		152,168	147,809
Latin America
Segment EBIT:
Segment EBIT		12,599	6,590
Reconciliation of Segment EBIT to Net Loss:
Goodwill impairment (note 4)		0	(79,700)
Depreciation & Amortization:
Depreciation and amortization		17,457	18,576
Capital Expenditures:
Capital Expenditures		13,527	18,520
Segment Assets:
Accounts Receivable, Net and Inventory, Net		64,166	63,093
EMEA
Segment EBIT:
Segment EBIT		7,219	1,321
Depreciation & Amortization:
Depreciation and amortization		7,412	7,377
Capital Expenditures:
Capital Expenditures		5,051	17,158
Segment Assets:
Accounts Receivable, Net and Inventory, Net		46,576	48,270
Other Segments
Segment EBIT:
Segment EBIT		1,872	(3,838)
Depreciation & Amortization:
Depreciation and amortization		4,431	5,088
Capital Expenditures:
Capital Expenditures		745	1,226
Segment Assets:
Accounts Receivable, Net and Inventory, Net		13,170	18,711
Corporate
Depreciation & Amortization:
Depreciation and amortization		1,675	1,838
Capital Expenditures:
Capital Expenditures		3,561	668
Product
Net Sales:
Net sales		797,858	781,828
Product | U.S. & Canada
Net Sales:
Net sales		483,741	481,797
Product | Latin America
Net Sales:
Net sales		148,091	144,322
Product | EMEA
Net Sales:
Net sales		138,399	126,924
Product | Other Segments
Net Sales:
Net sales		$ 27,627	$ 28,785

[1] Legal and professional fees associated with a strategic initiative that was terminated during the third quarter of 2018.