CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012
Revenues	$ 115,002	$ 114,578	$ 356,531	$ 371,637
Operating expenses:
Cost of operations	84,168	81,398	254,417	253,248
General and administration	14,480	13,933	43,788	46,202
Depreciation and amortization	14,045	14,827	43,433	44,394
Severance and reorganization costs	1,636		3,463
Expense from divestiture, acquisition and financing costs	372		1,003
Loss on divestiture	353		353
Legal settlement				1,359
Development project charge				131
Total operating expenses	115,054	110,158	346,457	345,334
Operating (loss) income	(52)	4,420	10,074	26,303
Other expense (income):
Interest income	(50)	(20)	(68)	(32)
Interest expense	9,407	11,528	32,958	33,897
Loss from equity method investments	1,436	6,383	3,311	10,163
Impairment of equity method investment		10,680		10,680
(Gain) loss on derivative instruments	(24)		3,871
Loss on debt extinguishment	5,914		15,584
Other income	(298)	(117)	(737)	(549)
Other expense, net	16,385	28,454	54,919	54,159
Loss from continuing operations before income taxes and discontinued operations	(16,437)	(24,034)	(44,845)	(27,856)
(Benefit) provision for income taxes	(4,963)	601	(3,899)	1,330
Loss from continuing operations before discontinued operations	(11,474)	(24,635)	(40,946)	(29,186)
Discontinued operations:
Gain on disposal of discontinued operations (net of income tax provision of $0, $0, $0 and $489)				725
Net income (loss)	(11,474)	(24,635)	(40,946)	(28,461)
Less: Net loss attributable to noncontrolling interest	(67)		(199)
Net income (loss) attributable to common stockholders	(11,407)	(24,635)	(40,747)	(28,461)
Amounts attributable to common stockholders:
Loss from continuing operations before discontinued operations	(11,407)	(24,635)	(40,747)	(29,186)
Gain on disposal of discontinued operations, net of tax				725
Net income (loss) attributable to common stockholders	$ (11,407)	$ (24,635)	$ (40,747)	$ (28,461)
Basic and diluted earnings per share:
Loss from continuing operations before discontinued operations	$ (0.29)	$ (0.92)	$ (1.26)	$ (1.09)
Gain on disposal of discontinued operations, net of tax				$ 0.02
Net loss per common share	$ (0.29)	$ (0.92)	$ (1.26)	$ (1.07)
Weighted average common shares outstanding:
Basic and diluted	39,230	26,822	32,365	26,715