Business Acquisitions - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Nov. 10, 2016	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 47,624	$ 34,371
TIW Corporation
Business Acquisition [Line Items]
Cash	$ 1,829
Trade receivables	9,794
Inventories	29,896
Prepaid and other current assets	3,572
Deferred income taxes	205
Property, plant and equipment	38,058
Intangible assets	29,808
Total assets acquired	113,162
Accounts payable	10,325
Customer prepayments	2,757
Other accrued liabilities	2,644
Deferred tax liabilities, non-current	2,261
Total liabilities assumed	17,987
Net identifiable assets acquired	95,175
Goodwill	33,522
Net assets acquired	128,697
Patents | TIW Corporation
Business Acquisition [Line Items]
Intangible assets	$ 3,000
Weighted average useful life	10 years
Trade Names | TIW Corporation
Business Acquisition [Line Items]
Intangible assets	$ 8,400
Customer relationships | TIW Corporation
Business Acquisition [Line Items]
Intangible assets	$ 18,100
Weighted average useful life	15 years