Summary of Most Significant Impacts of ASU 2016-09 in Beginning Stockholders’ Equity (Detail) - USD ($) $ in Thousands	Apr. 01, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Balance	$ 529,152	$ 936,890	$ 689,524	$ 452,071	$ 368,775
Number of Shares Outstanding		45,122,985	44,375,337
Cumulative effect of adoption of ASU 2016-09	77,081
Common Stock
Balance	$ 437	$ 451	$ 444	$ 437	$ 426
Number of Shares Outstanding	43,673,286	45,122,985	44,375,337	43,673,286	42,596,228
Treasury Stock
Balance	$ (46,763)	$ (138,852)	$ (67,078)	$ (46,763)	$ (26,660)
Number of Shares Outstanding	1,575,995	1,903,241	1,725,312	1,575,995	1,376,891
Additional Paid in Capital
Balance	$ 567,797	$ 690,507	$ 619,905	$ 565,962	$ 508,624
Cumulative effect of adoption of ASU 2016-09	1,835
Retained Earnings (Accumulated Deficit)
Balance	28,287	399,473	140,457	(46,959)	(99,075)
Cumulative effect of adoption of ASU 2016-09	75,246
Accumulated Other Comprehensive (Loss)
Balance	$ (20,606)	$ (14,689)	$ (4,204)	$ (20,606)	$ (14,540)

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 4.E)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(31))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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