Investments in and Loans to Joint Ventures (Tables)

3 Months Ended

Mar. 31, 2016

Schedule of Equity Method Investments [Line Items]

Summary of financial information

	March 31, 2016		December 31, 2015
	(in thousands)
Carrying amount of investments in and loans to joint ventures
Ohio Castings	$	7,577	$	7,776
Axis	19,809		19,621
Total investments in and loans to joint ventures	$	27,386	$	27,397

Ohio Castings [Member]

Schedule of Equity Method Investments [Line Items]

Summary of financial information

Summary financial results for Ohio Castings, the investee company, in total, are as follows:

	Three Months Ended   March 31,
	2016			2015
	(in thousands)
Results of operations
Revenues	$	13,654		$	23,388
Gross profit	$	210		$	2,048
Net (loss) earnings	$	(598	)	$	1,132

Axis [Member]

Schedule of Equity Method Investments [Line Items]

Summary of financial information

Summary financial results for Axis, the investee company, in total, are as follows:

	Three Months Ended   March 31,
	2016		2015
	(in thousands)
Results of operations
Revenues	$	16,411	$	20,340
Gross profit	$	5,042	$	5,063
Earnings before interest	$	4,768	$	4,789
Net earnings	$	3,854	$	3,664