NOTE 5: Intangible Assets

Intangible assets at the end of fiscal 2017 and 2016 were as follows:

In Thousands			2017				2016
	Weighted		Gross				Gross
	Average Years		Carrying		Accum.		Carrying		Accum.
	Useful Life		Amount		Amort.		Amount		Amort.
Amortized Intangible Assets:
Programs		16	$	625,470	$	339,920	$	607,276	$	293,223
Core technology		12		15,926		13,123		15,926		11,778
Patents and other		12		89,736		60,335		86,286		51,250
Total			$	731,132	$	413,378	$	709,488	$	356,251

Indefinite-lived Intangible Assets:
Trademarks			$	41,412			$	39,798

Programs represent the valuation of systems or components sold under long-term supply agreements with aerospace companies, military contractors, and OEM manufacturers using similar technology. The valuation of the program includes the values of the program-specific technology, the backlog of contracts, and the relationship with customers which lead to potential future contracts. The valuation of the program is based upon its discounted cash flow at a market-based discount rate.

Amortization of intangible assets from continuing operations was $44.2 million, $49.4 million, and $44.0 million in fiscal 2017, 2016, and 2015, respectively. Amortization of intangible assets related to discontinued operations was $1.2 million in fiscal 2015.

Estimated amortization expense related to intangible assets for each of the next five fiscal years is as follows:

In Thousands

Fiscal Year

2018	$	45,953
2019		45,076
2020		42,941
2021		41,555
2022		35,355