Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Composition of Goodwill and Changes

Composition of goodwill and changes therein the years ended December 31, 2015 and 2014 are as follows:

	December 31
	2015			2014
	$ in thousands
Balance at the beginning of year		179,445			12,444
Acquired during the year (see Note 3)		—			167,001
Disposed during the year following the Thermal    Products Business based on relative fair value		(9,593	)
Purchase price adjustment		325
Balance at the end of the year		170,177			179,445

Summary of Other Intangible Assets

Other intangible assets are composed as follows:

	December 31
	2015		2014
	$ in thousands
Cost:
Intellectual property		126,190		120,780
Customer relations		96,824		100,831
Trade name		5,618		5,960
In-process research and development		—		6,920
Backlog		10,029		10,398
		238,661		244,889
Less:
Accumulated amortization		129,026		99,807
		109,635		145,082

Estimated Amortization Expense

Estimated amortization expense for the years stated below is as follows:

	$ in thousands:
Year ending December 31:
2016		26,993
2017		25,405
2018		25,093
2019		18,226
2020		9,880
2021 and thereafter		4,038
		109,635