Quarterly Financial Information (Unaudited) (Tables) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended													12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016	Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Net sales	$ 106,566	[1]	$ 114,644	[2]	$ 135,994	[3]	$ 126,310	$ 139,138	[4]	$ 176,059	[5]	$ 171,419	$ 137,907	$ 415,375	$ 537,214		$ 561,899
Gross profit	18,779	[1]	19,803	[2]	27,813	[3]	23,960	29,872	[4]	36,038	[5]	37,089	30,653	90,356	133,653		121,591
Net (loss) income	$ (40,851)	[1]	$ (5,982)	[2]	$ (91,996)	[3]	$ (2,832)	$ 3,328	[4]	$ (57,422)	[5]	$ 5,362	$ 4,285	$ (141,660)	$ (44,445)		$ 25,656
Basic (loss) earnings per common share	$ (3.97)	[1]	$ (0.58)	[2]	$ (8.96)	[3]	$ (0.28)	$ 0.33	[4]	$ (5.60)	[5]	$ 0.52	$ 0.42	$ (13.79)	$ (4.33)		$ 2.51
Diluted (loss) earnings per common share	(3.97)	[1]	(0.58)	[2]	(8.96)	[3]	(0.28)	0.32	[4]	(5.60)	[5]	0.52	0.41	(13.79)	(4.33)		2.48
Dividends paid per common share	$ 0	[1]	$ 0.04	[2]	$ 0.04	[3]	$ 0.04	$ 0.04	[4]	$ 0.04	[5]	$ 0.04	$ 0.04	$ 0.12	$ 0.16		$ 0.13
Goodwill, Impairment Loss					$ 128,938									$ 61,142	$ 80,337		$ 0
Pre-tax gain on sale of facility			$ 6,946												$ 2,279	[6]	$ 0	[6]
Deferred Tax Liabilities, Undistributed Foreign Earnings	$ 7,932													7,932
Deferred Tax Assets, Valuation Allowance	$ 29,719													$ 29,719
Tucson, AZ [Member]
Pre-tax gain on sale of facility								$ 2,279
Precise Structural Products Business [Member]
Goodwill, Impairment Loss										$ 80,337

[1] Fourth quarter 2016 includes deferred U.S. income taxes and foreign withholding taxes of $7,932 on unremitted foreign earnings and a valuation allowance of $29,719 against deferred tax assets.

[2] Third quarter 2016 includes $6,946

[3] Second quarter 2016 includes $128,938 impairment of assets related to the Chemtec, Protective Coatings, IOS and Rail Technologies product groups.

[4] Fourth quarter 2015 includes $2,279 pre-tax gain on sale of Tucson, AZ concrete tie facility.

[5] Third quarter 2015 includes $80,337 impairment of goodwill related to the IOS and Chemtec reporting units.

[6] On December 23, 2015, the Company sold certain assets related to the former Tucson, AZ precast concrete tie facility for $2,750 resulting in a pre-tax gain on sale of $2,279.