UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY AND REDEEMABLE NONCONTROLLING INTEREST - 6 months ended Sep. 30, 2016 - USD ($) $ in Thousands	Total	Redeemable Noncontrolling Interest	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interests	Total Stockholders' Investment
Redeemable noncontrolling interest, beginning balance at Mar. 31, 2016		$ 15,473
Stockholders' equity, beginning balance at Mar. 31, 2016	$ 1,509,892		$ 377	$ 801,173	$ 1,172,273	$ (289,819)	$ (184,796)	$ 10,684	$ 1,509,892
Common stock, shares, beginning balance at Mar. 31, 2016	34,976,743		34,976,743.000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, value		0	$ 1	2,628	0	0	0	0	2,629
Issuance of common stock, shares			118,419
Distributions paid to noncontrolling interests		0	$ 0	0	0	0	0	(25)	(25)
Common stock dividends		0	0	0	(4,910)	0	0	0	(4,910)
Currency translation adjustments	$ 4,965	(1,448)	0	0	0	0	0	(3,517)	(3,517)
Net loss	(71,179)	(850)	0	0	(70,569)	0	0	240	(70,329)
Other comprehensive income		0	0	0	0	(17,539)	0	0	(17,539)
Redeemable noncontrolling interest, ending balance at Sep. 30, 2016		$ 13,175
Stockholders' equity, ending balance at Sep. 30, 2016	$ 1,416,201		$ 378	$ 803,801	$ 1,096,794	$ (307,358)	$ (184,796)	$ 7,382	$ 1,416,201
Common stock, shares, ending balance at Sep. 30, 2016	35,095,162		35,095,162.000