CONSOLIDATED STATEMENT OF STOCKHOLDERS' INVESTMENT AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Total stockholders' investment, beginning balance, value	$ 1,618,786
Common stock, shares outstanding, beginning balance	34,838,374	35,708,469
Dividends paid to noncontrolling interest	$ (153)	$ 0	$ 0
Repurchases of common stock, shares		(1,160,940)	(1,043,875)
Other comprehensive income	(19,490)	$ (113,823)	$ 43,177
Total stockholders' investment, ending balance, value	$ 1,509,892	$ 1,618,786
Common stock, shares outstanding, ending balance	34,976,743	34,838,374	35,708,469
Redeemable Noncontrolling Interest
Redeemable noncontrolling interest, beginning balance	$ 26,223	$ 22,283	$ 0
Issuance of common stock	0	0	0
Correction of historical shares outstanding		0	0
Acquisition of noncontrolling interests		3,427	21,139
Acquisition of noncontrolling interests	(5,467)
Distributions paid to noncontrolling interests	0	0	0
Dividends paid to noncontrolling interest	0
Repurchase of common stock		0	0
Common stock dividends	0	0	0
Currency translation adjustments	(1,070)	(2,837)	473
Net income (loss)	(5,711)	3,350	671
Accretion of noncontrolling interests	1,498
Other comprehensive income	0	0	0
Redeemable noncontrolling interest, ending balance	15,473	26,223	22,283
Common Stock
Total stockholders' investment, beginning balance, value	$ 376	$ 373	$ 367
Common stock, shares outstanding, beginning balance	34,838,374	35,708,469	36,150,639
Issuance of common stock	$ 1	$ 3	$ 6
Issuance of common stock, shares	138,369	290,754	601,405
Correction of historical shares outstanding		$ 0	$ 0
Correction of historical shares outstanding, shares		91	300
Acquisition of noncontrolling interests		$ 0	$ 0
Acquisition of noncontrolling interests	$ 0
Distributions paid to noncontrolling interests	0	0	0
Dividends paid to noncontrolling interest	0
Repurchase of common stock		$ 0	$ 0
Repurchases of common stock, shares		(1,160,940)	(1,043,875)
Common stock dividends	0	$ 0	$ 0
Currency translation adjustments	0	0	0
Net income (loss)	0	0	0
Accretion of noncontrolling interests	0
Other comprehensive income	0	0	0
Total stockholders' investment, ending balance, value	$ 377	$ 376	$ 373
Common stock, shares outstanding, ending balance	34,976,743	34,838,374	35,708,469
Additional Paid-in Capital
Total stockholders' investment, beginning balance, value	$ 781,837	$ 762,813	$ 731,883
Issuance of common stock	18,784	22,194	33,008
Correction of historical shares outstanding		0	0
Acquisition of noncontrolling interests		(3,170)	(2,078)
Acquisition of noncontrolling interests	552
Distributions paid to noncontrolling interests	0	0	0
Dividends paid to noncontrolling interest	0
Repurchase of common stock		0	0
Common stock dividends	0	0	0
Currency translation adjustments	0	0	0
Net income (loss)	0	0	0
Accretion of noncontrolling interests	0
Other comprehensive income	0	0	0
Total stockholders' investment, ending balance, value	801,173	781,837	762,813
Retained Earnings
Total stockholders' investment, beginning balance, value	1,284,442	1,245,220	1,094,803
Issuance of common stock	0	0	0
Correction of historical shares outstanding		0	0
Acquisition of noncontrolling interests		0	0
Acquisition of noncontrolling interests	0
Distributions paid to noncontrolling interests	0	0	0
Dividends paid to noncontrolling interest	(153)
Repurchase of common stock		0	0
Common stock dividends	(38,076)	(45,078)	(36,320)
Currency translation adjustments	0	0	0
Net income (loss)	(72,442)	84,300	186,737
Accretion of noncontrolling interests	(1,498)
Other comprehensive income	0	0	0
Total stockholders' investment, ending balance, value	1,172,273	1,284,442	1,245,220
Accumulated other comprehensive income (loss)
Total stockholders' investment, beginning balance, value	(270,329)	(156,506)	(199,683)
Issuance of common stock	0	0	0
Correction of historical shares outstanding		0	0
Acquisition of noncontrolling interests		0	0
Acquisition of noncontrolling interests	0
Distributions paid to noncontrolling interests	0	0	0
Dividends paid to noncontrolling interest	0
Repurchase of common stock		0	0
Common stock dividends	0	0	0
Currency translation adjustments	0	0	0
Net income (loss)	0	0	0
Accretion of noncontrolling interests	0
Other comprehensive income	(19,490)	(113,823)	43,177
Total stockholders' investment, ending balance, value	(289,819)	(270,329)	(156,506)
Treasury Stock
Total stockholders' investment, beginning balance, value	(184,796)	(103,965)	(26,304)
Issuance of common stock	0	0	0
Correction of historical shares outstanding		0	0
Acquisition of noncontrolling interests		0	0
Acquisition of noncontrolling interests	0
Distributions paid to noncontrolling interests	0	0	0
Dividends paid to noncontrolling interest	0
Repurchase of common stock		(80,831)	(77,661)
Common stock dividends	0	0	0
Currency translation adjustments	0	0	0
Net income (loss)	0	0	0
Accretion of noncontrolling interests	0
Other comprehensive income	0	0	0
Total stockholders' investment, ending balance, value	(184,796)	(184,796)	(103,965)
Noncontrolling Interest
Total stockholders' investment, beginning balance, value	7,256	8,651	9,891
Issuance of common stock	0	0	0
Correction of historical shares outstanding		0	0
Acquisition of noncontrolling interests		0	0
Acquisition of noncontrolling interests	0
Distributions paid to noncontrolling interests	(55)	(59)	(57)
Dividends paid to noncontrolling interest	0
Repurchase of common stock		0	0
Common stock dividends	0	0	0
Currency translation adjustments	2,479	(2,392)	(1,554)
Net income (loss)	1,004	1,056	371
Accretion of noncontrolling interests	0
Other comprehensive income	0	0	0
Total stockholders' investment, ending balance, value	10,684	7,256	8,651
Total Stockholders' Investment
Total stockholders' investment, beginning balance, value	1,618,786	1,756,586	1,610,957
Issuance of common stock	18,785	22,197	33,014
Correction of historical shares outstanding		0	0
Acquisition of noncontrolling interests		(3,170)	(2,078)
Acquisition of noncontrolling interests	552
Distributions paid to noncontrolling interests	(55)	(59)	(57)
Dividends paid to noncontrolling interest	(153)
Repurchase of common stock		(80,831)	(77,661)
Common stock dividends	(38,076)	(45,078)	(36,320)
Currency translation adjustments	2,479	(2,392)	(1,554)
Net income (loss)	(71,438)	85,356	187,108
Accretion of noncontrolling interests	(1,498)
Other comprehensive income	(19,490)	(113,823)	43,177
Total stockholders' investment, ending balance, value	$ 1,509,892	$ 1,618,786	$ 1,756,586