Assets Manufactured for Internal Use, net (Tables)

12 Months Ended

Dec. 31, 2018

Assets Manufactured for Internal Use, net

Schedule of components of assets manufactured for internal use

	December 31,
	2018		2017
	(in thousands)
Internal use assets	$	47,509	$	40,366
Construction in process		1,609		301
Total cost		49,118		40,667
Accumulated depreciation		(19,285)		(20,035)
Assets manufactured for internal use, net	$	29,833	$	20,632