Components of Income Tax Benefit (Provision) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015		Mar. 31, 2014	Mar. 31, 2013
Income Taxes [Line Items]
Income (loss) before income taxes, foreign													$ 6,522		$ 4,263	$ 6,660
Income (loss) before income taxes	12,372		13,701		4,175		(1,483)		3,762	4,651	1,429	(1,312)	28,765		8,530	16,862
Current income tax provision, Federal													464		(100)	97
Current income tax provision, State													424		(106)
Current income tax provision, Foreign													1,283		525	996
Current income tax provision													2,171		319	1,093
Deferred income tax provision, Federal													(66,140)		825	825
Deferred income tax provision, State													(13,430)		35	(70)
Deferred income tax provision, Foreign													(7,524)
Deferred income tax provision													(87,094)		860	755
Total income tax (benefit) provision	(86,502)	[1]	1,017	[1]	336	[1]	226	[1]	140	258	370	411	(84,923)	[1]	1,179	1,848
United States
Income Taxes [Line Items]
Income (loss) before income taxes													$ 22,243		$ 4,267	$ 10,202

[1] Net income for the quarter and year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of the valuation allowance on certain deferred tax assets in the quarter ended March 31, 2015.