Restructuring (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 261
Write-down of inventories	7,847	$ 6,133	$ 8,349
Restructuring Reserve [Roll Forward]
Restructuring obligations December 31, 2018	2,816
Charges	261
Cash payments	(846)
Non-cash settlements and other	(2,231)
Restructuring obligations December 31, 2019	0	2,816
Operating lease, liability	18,629			$ 20,800
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	88
Restructuring Reserve [Roll Forward]
Restructuring obligations December 31, 2018	436
Charges	88
Cash payments	(524)
Non-cash settlements and other	0
Restructuring obligations December 31, 2019	0	436
Facilities Consolidation
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Restructuring Reserve [Roll Forward]
Restructuring obligations December 31, 2018	769
Charges	0
Cash payments	(149)
Non-cash settlements and other	(620)
Restructuring obligations December 31, 2019	0	769
Operating lease, liability	600
Others
Restructuring Cost and Reserve [Line Items]
Restructuring charges	173
Restructuring Reserve [Roll Forward]
Restructuring obligations December 31, 2018	1,611
Charges	173
Cash payments	(173)
Non-cash settlements and other	(1,611)
Restructuring obligations December 31, 2019	0	1,611
Operating lease, liability	1,600
Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300	3,100
Restructuring Reserve [Roll Forward]
Charges	$ 300	3,100
Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges		200
Write-down of inventories			$ 2,000
Restructuring Reserve [Roll Forward]
Charges		$ 200