Revenue (Tables)

12 Months Ended

Dec. 31, 2019

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 Year Ended December 31,
End Market	2019		2018
Energy	$	222,779	$	185,685
Industrial	180,111		201,196
Transportation	143,186		109,157
Total	$	546,076	$	496,038

The following table summarizes net sales by geographic area:

(in thousands)	For the Year Ended December 31,
Geographic Area	2019		2018
North America	$	483,302	$	436,068
Pacific Rim	39,180		42,071
Europe	16,562		13,743
Other	7,032		4,156
Total	$	546,076	$	496,038

Schedule of Contract Balances

(in thousands)	As of December 31,
	2019			2018
Short-term contract assets (included in Prepaid expenses and other current assets)	$	694		$	2,926
Short-term contract liabilities (included in Other accrued liabilities)	(26,898		)	(4,897		)
Long-term contract liabilities (included in Noncurrent contract liabilities)	(17,998		)	(14,611		)
Net contract liabilities	$	(44,202	)	$	(16,582	)