Schedule of Changes in Beginning Stockholders' Equity (Detail) - USD ($) $ in Thousands	Apr. 01, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Balance	$ 529,152	$ 689,524	$ 452,071	$ 368,775	$ 291,560
Common stock, Outstanding		44,375,337	43,673,286
Cumulative effect of adoption of new accounting standard	77,081
Common Stock
Balance	$ 437	$ 444	$ 437	$ 426	$ 413
Common stock, Outstanding	43,673,286	44,375,337	43,673,286	42,596,228	41,335,773
Treasury Stock
Balance	$ (46,763)	$ (67,078)	$ (46,763)	$ (26,660)	$ (19,347)
Common stock, Outstanding	1,575,995	1,725,312	1,575,995	1,376,891	1,282,944
Additional Paid in Capital
Balance	$ 567,797	$ 619,905	$ 565,962	$ 508,624	$ 465,046
Cumulative effect of adoption of new accounting standard	1,835
Accumulated Deficit
Balance	28,287	140,457	(46,959)	(99,075)	(137,222)
Cumulative effect of adoption of new accounting standard	75,246
Accumulated Other Comprehensive Income (Loss)
Balance	$ (20,606)	$ (4,204)	$ (20,606)	$ (14,540)	$ (17,330)