Acquisition (Assets and Liabilities Acquired) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jan. 22, 2015	Dec. 31, 2014
Assets:
Goodwill	$ 177,604		$ 98,227
Arlon [Member]
Assets:
Cash		$ 142
Accounts receivable		17,301
Other current assets		856
Inventory		9,916
Deferred income tax assets, current		1,278
Property, plant & equipment		30,667
Intangible assets		50,020
Goodwill		86,337
Total assets		196,517
Liabilities:
Accounts payable		4,958
Other current liabilities		4,249
Deferred tax liability		23,706
Other long-term liabilities		5,056
Total liabilities		37,969
Fair value of net assets acquired		$ 158,548