Income/Loss Per Share (Details) (USD $) In Thousands, except Per Share data, 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
Numerator
Income (loss) from continuing operations	$ (19,847)	$ 3,078	$ 7,730	$ (10,483)	$ (14,550)	$ (4,744)	$ (11,945)	$ (33,630)	$ (19,522)	$ (64,869)	$ (78,512)
Income (loss) from discontinued operations, net of income tax expense (benefit) of $1,976, $(98) and $37, respectively	0	(164)	(1,400)	6,943	103	(1,076)	(1,151)	(1,510)	5,379	(3,634)	(3,670)
Net income (loss)	$ (19,847)	$ 2,914	$ 6,330	$ (3,540)	$ (14,447)	$ (5,820)	$ (13,096)	$ (35,140)	$ (14,143)	$ (68,503)	$ (82,182)
Weighted-average common shares outstanding:
Basic (in shares)									45,381	45,102	44,897
Assumed conversion of employee stock options (in shares)									0	0	0
Assumed conversion of Platinum Warrant (in shares)									0	0	0
Weighted-average shares outstanding (diluted)									45,381	45,102	44,897
Net income (loss) per basic share:
Loss from continuing operations (in dollars per share)	$ (0.44)	$ 0.07	$ 0.17	$ (0.23)	$ (0.32)	$ (0.11)	$ (0.26)	$ (0.75)	$ (0.43)	$ (1.44)	$ (1.75)
Income (loss) from discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ (0.03)	$ 0.15	$ 0.00	$ (0.02)	$ (0.03)	$ (0.03)	$ 0.12	$ (0.08)	$ (0.08)
Net income (loss) (in dollars per share)	$ (0.44)	$ 0.07	$ 0.14	$ (0.08)	$ (0.32)	$ (0.13)	$ (0.29)	$ (0.78)	$ (0.31)	$ (1.52)	$ (1.83)
Net income (loss) per diluted share:
Loss from continuing operations (in dollars per share)	$ (0.44)	$ 0.06	$ 0.15	$ (0.23)	$ (0.32)	$ (0.11)	$ (0.26)	$ (0.75)	$ (0.43)	$ (1.44)	$ (1.75)
Income (loss) from discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ (0.03)	$ 0.15	$ 0.00	$ (0.02)	$ (0.03)	$ (0.03)	$ 0.12	$ (0.08)	$ (0.08)
Net income (loss) (in dollars per share)	$ (0.44)	$ 0.06	$ 0.12	$ (0.08)	$ (0.32)	$ (0.13)	$ (0.29)	$ (0.78)	$ (0.31)	$ (1.52)	$ (1.83)