Property, Plant and Equipment, and Leases (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Estimated useful lives by each type of asset category are as follows:

	Years
Buildings	Up to 39
Leasehold improvements	Lesser of (i) expected useful life of improvement or (ii) life of lease (including likely extension thereof)
Machinery and equipment	1 to 10

Property, plant and equipment by type were as follows:

(in thousands)	As of December 31,
Property, Plant and Equipment	2018			2017
Leasehold improvements	$	6,405		$	6,320
Machinery and equipment	38,454			27,379
Construction in progress	1,241			2,036
Total property, plant and equipment, at cost	46,100			35,735
Accumulated depreciation	(21,834		)	(16,775		)
Property, plant and equipment, net	$	24,266		$	18,960

Schedule of Future Minimum Lease Payments

The future minimum lease payments due under operating and capital leases in effect, as amended and extended, as of December 31, 2018, were as follows:

	Year Ending December 31,
(in thousands)	Operating		Capital
2019	$	5,071	$	80
2020	5,175		63
2021	4,724		67
2022	4,681		50
2023	3,104		13
2024 and beyond	3,694		—
Total	$	26,449	$	273