CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY AND REDEEMABLE NONCONTROLLING INTEREST - 3 months ended Jun. 30, 2018 - 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	$ 1,178,144	$ 382	$ 852,565	$ 788,834	$ (286,094)	$ (184,796)	$ 7,253
Common stock, shares beginning balance at Mar. 31, 2018	35,526,625	35,526,625
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 4,264	$ 3	4,261
Issuance of common stock, shares		238,650
Distributions paid to noncontrolling interests	(14)						(14)
Currency translation adjustments	(139)						(139)
Net income (loss)	(32,041)			(32,108)			67
Other comprehensive loss	(27,824)				(27,824)
Total stockholders’ investment at Jun. 30, 2018	$ 1,120,644	$ 385	$ 856,826	754,980	$ (313,918)	$ (184,796)	$ 7,167
Common stock, shares ending balance at Jun. 30, 2018	35,765,275	35,765,275
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting guidance	$ (1,746)			$ (1,746)