Net (Loss) Income Per Common Share (Narrative) (Detail) - $ / shares shares in Thousands		1 Months Ended	3 Months Ended	9 Months Ended
		Dec. 21, 2016	Mar. 31, 2018	Mar. 31, 2018	Nov. 30, 2015
Net Income Per Common Share [Line Items]
Number of shares issued in connection with acquisition included in weighted average shares outstanding	[1]			5,122
Common equivalent shares excluded from computation of earnings per share due to net loss			100	181
Antidilutive securities excluded from computation of earnings per share			170	143
Citron and Lucid
Net Income Per Common Share [Line Items]
Number of shares issued in connection with acquisition included in weighted average shares outstanding		5,122	5,122	5,122
Convertible Senior Notes
Net Income Per Common Share [Line Items]
Senior notes, initial conversion price per share					$ 33.215

[1] (as restated)