CONDENSED STATEMENTS OF CONSOLIDATED STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Retained Deficit	Currency Translation Adjustment	Pensions, Net of Tax	Loss on Derivatives, Net of Tax	Noncontrolling Interests
Beginning balance at Mar. 31, 2017	$ 206,710	$ 472,349	$ (208,784)	$ (22,293)	$ (36,654)	$ (1,100)	$ 3,192
Statement of Consolidated Stockholders' Equity
Net loss	(32,633)		(32,543)				(90)
Stock-based compensation	291	291
Other comprehensive (loss) income, net of tax	3,639			3,742	459	(562)
Ending balance at Jun. 30, 2017	178,007	472,640	(241,327)	(18,551)	(36,195)	(1,662)	3,102
Beginning balance at Mar. 31, 2017	206,710	472,349	(208,784)	(22,293)	(36,654)	(1,100)	3,192
Statement of Consolidated Stockholders' Equity
Net loss	(31,679)
Other comprehensive (loss) income, net of tax	6,518
Ending balance at Sep. 30, 2017	182,092	472,892	(240,304)	(16,202)	(35,736)	(1,591)	3,033
Beginning balance at Jun. 30, 2017	178,007	472,640	(241,327)	(18,551)	(36,195)	(1,662)	3,102
Statement of Consolidated Stockholders' Equity
Net loss	956		1,024				(68)
Restricted stock surrender	(2)	(2)
Stock-based compensation	253	253
Other comprehensive (loss) income, net of tax	2,879			2,349	459	71
Ending balance at Sep. 30, 2017	182,092	472,892	(240,304)	(16,202)	(35,736)	(1,591)	3,033
Beginning balance at Mar. 31, 2018	282,828	473,476	(156,348)	(12,682)	(32,580)	0	10,962
Statement of Consolidated Stockholders' Equity
Net loss	(1,413)		(759)				(654)
Stock-based compensation	295	295
Purchase of investment in subsidiary	5,531						5,531
Other comprehensive (loss) income, net of tax	(6,441)			(5,136)	366	(1,496)	(175)
Ending balance at Jun. 30, 2018	280,800	473,771	(157,107)	(17,818)	(32,214)	(1,496)	15,664
Beginning balance at Mar. 31, 2018	282,828	473,476	(156,348)	(12,682)	(32,580)	0	10,962
Statement of Consolidated Stockholders' Equity
Net loss	(56,254)
Other comprehensive (loss) income, net of tax	(4,695)
Ending balance at Sep. 30, 2018	228,155	474,221	(211,741)	(18,075)	(31,241)	(716)	15,707
Beginning balance at Jun. 30, 2018	280,800	473,771	(157,107)	(17,818)	(32,214)	(1,496)	15,664
Statement of Consolidated Stockholders' Equity
Net loss	(54,842)		(54,634)				(208)
Restricted stock surrender	(8)	(8)
Stock-based compensation	458	458
Other comprehensive (loss) income, net of tax	1,747			(257)	973	780	251
Ending balance at Sep. 30, 2018	$ 228,155	$ 474,221	$ (211,741)	$ (18,075)	$ (31,241)	$ (716)	$ 15,707