Revenue from Contracts with Customers Summary of Sales to External Customer by Operating Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 770,657	$ 619,793	$ 584,954
United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	548,980	437,838	407,917
China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	55,277	52,251	53,113
Mexico
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	39,498	40,937	45,863
Brazil
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	35,558	35,610	24,259
Germany
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	25,548	5,548	4,540
Switzerland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	11,506	5,450	0
Poland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7,031	5,183	0
Italy
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6,096	5,681	5,349
Czech Republic
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6,178	0	0
Netherlands
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,290	2,817	1,882
Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	31,695	28,478	42,031
Mobile Solutions
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	335,037	336,852	326,138
Mobile Solutions | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	187,178	190,828	196,217
Mobile Solutions | China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	43,610	45,503	44,579
Mobile Solutions | Mexico
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	27,053	26,639	24,919
Mobile Solutions | Brazil
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	35,314	35,425	23,801
Mobile Solutions | Germany
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,652	5,502	4,497
Mobile Solutions | Switzerland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,006	5,450	0
Mobile Solutions | Poland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7,010	5,183	0
Mobile Solutions | Italy
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,558	5,347	5,027
Mobile Solutions | Czech Republic
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6,131	0	0
Mobile Solutions | Netherlands
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Mobile Solutions | Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	12,525	16,975	27,098
Power Solutions
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	189,778	186,602	180,330
Power Solutions | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	157,357	152,938	134,564
Power Solutions | China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,537	6,481	8,131
Power Solutions | Mexico
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	12,254	14,220	20,944
Power Solutions | Brazil
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	215	185	458
Power Solutions | Germany
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	26	11	8
Power Solutions | Switzerland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	54	0	0
Power Solutions | Poland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13	0	0
Power Solutions | Italy
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	221	334	322
Power Solutions | Czech Republic
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	47	0	0
Power Solutions | Netherlands
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,290	2,817	1,882
Power Solutions | Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	10,764	9,616	14,021
Life Sciences
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	248,173	98,329	80,057
Life Sciences | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	206,776	96,062	78,707
Life Sciences | China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6,130	267	403
Life Sciences | Mexico
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	191	78	0
Life Sciences | Brazil
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	29	0	0
Life Sciences | Germany
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	19,870	35	35
Life Sciences | Switzerland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6,446	0	0
Life Sciences | Poland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8	0	0
Life Sciences | Italy
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	317	0	0
Life Sciences | Czech Republic
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Life Sciences | Netherlands
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Life Sciences | Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8,406	1,887	912
Intersegment Sales Eliminations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(2,331)	(1,990)	(1,571)
Intersegment Sales Eliminations | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(2,331)	(1,990)	(1,571)
Intersegment Sales Eliminations | China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Mexico
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Brazil
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Germany
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Switzerland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Poland
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Italy
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Czech Republic
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Netherlands
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Intersegment Sales Eliminations | Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 0	$ 0	$ 0