Business Acquisition (Summary of operational results of AAC) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net sales	$ 251,600	$ 251,900	$ 255,400	$ 223,600	$ 226,700	$ 222,100	$ 215,600	$ 199,300	$ 213,000	$ 191,300	$ 203,200	$ 172,300		$ 982,479	$ 863,717	$ 779,839
Operating loss	37,400	40,800	42,200	17,000										137,408	78,676	94,132
Loss before income taxes														115,247	54,708	78,266
Net loss attributable to the Company	$ 17,600	$ 27,700	$ 29,900	$ 7,700	$ 5,900	$ 15,300	$ 1,100	$ 10,800	$ 15,700	$ 13,100	$ 10,400	$ 13,500		$ 82,891	$ 33,111	$ 52,733
Loss per share:
Basic	$ 0.54	$ 0.86	$ 0.93	$ 0.24	$ 0.19	$ 0.47	$ 0.03	$ 0.34	$ 0.49	$ 0.41	$ 0.32	$ 0.42		$ 2.57	$ 1.03	$ 1.64
Diluted	$ 0.54	$ 0.86	$ 0.93	$ 0.24	$ 0.19	$ 0.47	$ 0.03	$ 0.34	$ 0.49	$ 0.41	$ 0.32	$ 0.42		$ 2.57	$ 1.03	$ 1.64
Albany Aerostructures Composites LLC (AAC) [Member]
Business Acquisition [Line Items]
Net sales													$ 67,011
Operating loss													(1,246)
Loss before income taxes													(2,342)
Net loss attributable to the Company													$ (1,495)
Loss per share:
Basic													$ (0.05)
Diluted													$ (0.05)