UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - 3 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Total	Redeemable Noncontrolling Interests	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, 2017		$ 6,886
Stockholders' equity, beginning balance at Mar. 31, 2017	$ 1,294,232		$ 379	$ 809,995	$ 991,906	$ (328,277)	$ (184,796)	$ 5,025	$ 1,294,232
Common stock, shares beginning balance at Mar. 31, 2017	35,213,991		35,213,991
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, value		0	$ 1	3,862	0	0	0	0	3,863
Issuance of common stock, shares			89,849
Distributions paid to noncontrolling interests		0	$ 0	0	0	0	0	(12)	(12)
Common stock dividends		0	0	0	(2,465)	0	0	0	(2,465)
Currency translation adjustments	$ 310	258	0	0	0	0	0	52	52
Net income (loss)		(795)	0	0	(55,275)	0	0	325	(54,950)
Other comprehensive income		0	0	0	0	10,070	0	0	10,070
Redeemable noncontrolling interest, ending balance at Jun. 30, 2017		$ 6,349
Stockholders' equity, ending balance at Jun. 30, 2017	$ 1,250,790		$ 380	$ 813,857	$ 934,166	$ (318,207)	$ (184,796)	$ 5,390	$ 1,250,790
Common stock, shares ending balance at Jun. 30, 2017	35,303,840		35,303,840