CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY AND REDEEMABLE NONCONTROLLING INTEREST - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interests
Total stockholders’ investment at Mar. 31, 2018	$ 1,183,501	$ 382	$ 852,565	$ 794,191	$ (286,094)	$ (184,796)	$ 7,253
Common stock, shares beginning balance at Mar. 31, 2018		35,526,625
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	4,264	$ 3	4,261
Distributions paid to noncontrolling interests	(14)						(14)
Issuance of common stock, shares		238,650
Currency translation adjustments	(139)						(139)
Net income (loss)	(31,797)			(31,864)			67
Other comprehensive income	(27,824)				(27,824)
Total stockholders’ investment at Jun. 30, 2018	1,126,245	$ 385	856,826	760,581	(313,918)	(184,796)	7,167
Common stock, shares ending balance at Jun. 30, 2018		35,765,275
Total stockholders’ investment at Mar. 31, 2018	1,183,501	$ 382	852,565	794,191	(286,094)	(184,796)	7,253
Common stock, shares beginning balance at Mar. 31, 2018		35,526,625
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid to noncontrolling interest	(580)
Total stockholders’ investment at Sep. 30, 2018	976,076	$ 385	858,809	616,634	(322,015)	(184,796)	7,059
Common stock, shares ending balance at Sep. 30, 2018		35,798,185
Total stockholders’ investment at Jun. 30, 2018	1,126,245	$ 385	856,826	760,581	(313,918)	(184,796)	7,167
Common stock, shares beginning balance at Jun. 30, 2018		35,765,275
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	1,983	$ 0	1,983
Distributions paid to noncontrolling interests	(13)						(13)
Dividends paid to noncontrolling interest	(580)						(580)
Issuance of common stock, shares		32,910
Currency translation adjustments	(32)						(32)
Net income (loss)	(143,430)			(143,947)			517
Other comprehensive income	(8,097)				(8,097)
Total stockholders’ investment at Sep. 30, 2018	976,076	$ 385	858,809	616,634	(322,015)	(184,796)	7,059
Common stock, shares ending balance at Sep. 30, 2018		35,798,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting guidance	(1,746)			(1,746)
Total stockholders’ investment at Mar. 31, 2019	$ 812,367	$ 386	862,020	455,598	(327,989)	(184,796)	7,148
Common stock, shares beginning balance at Mar. 31, 2019	35,918,916	35,918,916
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 824	$ 0	824
Sale of subsidiaries	(5,612)						(5,612)
Issuance of common stock, shares		0
Currency translation adjustments	(11)						(11)
Net income (loss)	(169,088)			(169,246)			158
Other comprehensive income	17,362				17,362
Total stockholders’ investment at Jun. 30, 2019	655,842	$ 386	862,844	286,352	(310,627)	(184,796)	1,683
Common stock, shares ending balance at Jun. 30, 2019		35,918,916
Total stockholders’ investment at Mar. 31, 2019	$ 812,367	$ 386	862,020	455,598	(327,989)	(184,796)	7,148
Common stock, shares beginning balance at Mar. 31, 2019	35,918,916	35,918,916
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends paid to noncontrolling interest	$ 0
Total stockholders’ investment at Sep. 30, 2019	$ 481,162	$ 386	863,546	123,378	(321,802)	(184,796)	450
Common stock, shares ending balance at Sep. 30, 2019	35,918,916	35,918,916
Total stockholders’ investment at Jun. 30, 2019	$ 655,842	$ 386	862,844	286,352	(310,627)	(184,796)	1,683
Common stock, shares beginning balance at Jun. 30, 2019		35,918,916
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	702	$ 0	702
Distributions paid to noncontrolling interests	(1,323)						(1,323)
Issuance of common stock, shares		0
Currency translation adjustments	35						35
Net income (loss)	(162,919)			(162,974)			55
Other comprehensive income	(11,175)				(11,175)
Total stockholders’ investment at Sep. 30, 2019	$ 481,162	$ 386	$ 863,546	$ 123,378	$ (321,802)	$ (184,796)	$ 450
Common stock, shares ending balance at Sep. 30, 2019	35,918,916	35,918,916