Intangible Assets and Goodwill (Tables)

9 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets consist of the following (amounts in thousands):



	December 31, 2016
	Gross Amount		Accumulated Amortization			Net Amount
Core and developed technology	$	1,933,307	$	(378,750	)	$	1,554,557
Customer-related	909,141		(287,024		)	622,117
Trademarks and trade names	11,700		(9,120		)	2,580
Backlog	28,300		(21,225		)	7,075
In-process research and development	45,557		—			45,557
Distribution rights	5,580		(5,335		)	245
Other	1,805		(315		)	1,490
Total	$	2,935,390	$	(701,769	)	$	2,233,621



	March 31, 2016
	Gross Amount		Accumulated Amortization			Net Amount
Core and developed technology	$	724,883	$	(255,460	)	$	469,423
Customer-related	278,542		(200,331		)	78,211
Trademarks and trade names	11,700		(7,571		)	4,129
In-process research and development	54,308		—			54,308
Distribution rights	5,580		(5,302		)	278
Total	$	1,075,013	$	(468,664	)	$	606,349

Projected amortization expense

The following is an expected amortization schedule for the intangible assets for the remainder of fiscal 2017 through fiscal 2021, absent any future acquisitions or impairment charges (amounts in thousands):



Fiscal Year Ending March 31,	Projected Amortization Expense
2017	$84,229
2018	490,789
2019	362,836
2020	314,211
2021	257,368

Goodwill activity

Goodwill activity for the nine months ended December 31, 2016 was as follows (amounts in thousands):



	Semiconductor Products Reporting Unit			Technology Licensing Reporting Unit
Balance at March 31, 2016	$	993,452		$	19,200
Additions due to the acquisition of Atmel	1,349,452			—
Adjustments due to the acquisition of Micrel	(14		)	—
Balance at December 31, 2016	$	2,342,890		$	19,200