Condensed Statements of Consolidated Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Retained Deficit	Currency Translation Adjustment	Pensions, Net of Tax	Loss on Derivatives, Net of Tax	Noncontrolling Interests
Balance at beginning of period 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)
Balance at end of period at Jun. 30, 2018	280,800	473,771	(157,107)	(17,818)	(32,214)	(1,496)	15,664
Balance at beginning of period 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)
Balance at end of period at Sep. 30, 2018	228,155	474,221	(211,741)	(18,075)	(31,241)	(716)	15,707
Balance at beginning of period 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
Balance at end of period at Sep. 30, 2018	228,155	474,221	(211,741)	(18,075)	(31,241)	(716)	15,707
Balance at beginning of period at Mar. 31, 2019	192,019	468,936	(223,884)	(21,979)	(36,749)	(2,614)	8,309
Statement of Consolidated Stockholders' Equity
Net loss	(62,163)		(61,797)				(366)
Stock-based compensation	429	429
Other comprehensive (loss) income, net of tax	280			(430)	311	369	30
Balance at end of period at Jun. 30, 2019	130,565	469,365	(285,681)	(22,409)	(36,438)	(2,245)	7,973
Balance at beginning of period at Mar. 31, 2019	192,019	468,936	(223,884)	(21,979)	(36,749)	(2,614)	8,309
Statement of Consolidated Stockholders' Equity
Net loss	(78,767)
Other comprehensive (loss) income, net of tax	(1,937)
Balance at end of period at Sep. 30, 2019	111,635	469,736	(302,199)	(24,334)	(38,139)	(817)	7,388
Balance at beginning of period at Jun. 30, 2019	130,565	469,365	(285,681)	(22,409)	(36,438)	(2,245)	7,973
Statement of Consolidated Stockholders' Equity
Net loss	(16,604)		(16,518)				(86)
Restricted stock surrender	(12)	(12)
Stock-based compensation	383	383
Dividends paid	(480)						(480)
Other comprehensive (loss) income, net of tax	(2,217)			(1,925)	(1,701)	1,428	(19)
Balance at end of period at Sep. 30, 2019	$ 111,635	$ 469,736	$ (302,199)	$ (24,334)	$ (38,139)	$ (817)	$ 7,388