Revenue (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenue from External Customers by Geographic Areas

The following table summarizes net sales by end market:

(in thousands)	For the Three Months Ended March 31,
End Market	2020		2019
Energy	$	50,084	$	45,648
Industrial	37,131		50,587
Transportation	17,882		19,552
Total	$	105,097	$	115,787

The following table summarizes net sales by geographic area:

(in thousands)	For the Three Months Ended March 31,
Geographic Area	2020		2019
North America	$	94,520	$	97,679
Pacific Rim	6,454		12,625
Europe	2,657		3,377
Other	1,466		2,106
Total	$	105,097	$	115,787

Schedule of Contract Balances

(in thousands)	As of March 31, 2020			As of December 31, 2019
Short-term contract assets (included in Prepaid expenses and other current assets)	$	4,623		$	694
Short-term contract liabilities (included in Other accrued liabilities)	(36,670		)	(26,898		)
Long-term contract liabilities (included in Noncurrent contract liabilities)	(16,695		)	(17,998		)
Net contract liabilities	$	(48,742	)	$	(44,202	)