Property, Plant, and Equipment

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property, plant, and equipment consisted of the following (in thousands):



	December 31,
	2016			2015
Land	$	3,951		$	3,951
Buildings	23,280			23,439
Building improvements	28,049			25,741
Leasehold improvements	5,237			4,999
Computer hardware and software	39,409			35,350
Manufacturing test equipment	18,726			16,201
Furniture and fixtures	4,843			4,401
	123,495			114,082
Less: accumulated depreciation	(69,503		)	(60,797		)
	$	53,992		$	53,285

The cost of property, plant, and equipment totaling $3,191,000 and $2,285,000 was removed from both the asset and accumulated depreciation balances in 2016 and 2015, respectively. Gains and losses on these disposals were immaterial in both periods.

Buildings include rental property with a cost basis of $5,750,000 as of December 31, 2016 and 2015, and accumulated depreciation of $2,922,000 and $2,775,000 as of December 31, 2016 and 2015, respectively.