6. Goodwill, Trade Names and Other Intangible Assets

Trade names and other intangible assets are as follows as of:

 

										Initial
		December 31,				January 2,				Useful Life
		2016				2016				(in years)
		(in thousands)
Goodwill		$	108,060			$	65,635				indefinite
Other intangible assets:
Trade names		$	75,841			$	57,441				indefinite
Customer relationships			106,647				79,700				3-10
Developed technology			3,000				1,700				9-10
Non-compete agreement			1,668				600				2-5
Less: Accumulated amortization			(66,226	)			(60,130	)
Subtotal			45,089				21,870
Other intangible assets, net		$	120,930			$	79,311
Goodwill at January 2, 2016		$	65,635
Increase in goodwill from allocation of WinDoor purchase price			41,856
Increase in goodwill from allocation of USI purchase price			569
Goodwill at December 31, 2016		$	108,060
Tradenames at January 2, 2016		$	57,441
Increase in tradenames from the acquisition of WinDoor			18,400
Tradenames at December 31, 2016		$	75,841

Amortizable Intangible Assets

We test amortizable intangible assets for impairment when indicators of impairment exist. No impairment testing was performed during the years ended December 31, 2016, January 2, 2016, and January 3, 2015, as we determined that there were no impairment indicators at any time during that three-year period.

 

Estimated amortization of our customer relationships, developed technology and non-compete agreement intangible assets is as follows for future fiscal years:

 

(in thousands)		Total
2017		$	6,329
2018			6,341
2019			6,282
2020			6,278
2021			5,974
Thereafter			13,885
Total		$	45,089