XML 92 R98.htm IDEA: XBRL DOCUMENT v2.4.0.8
Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2014
Apr. 30, 2013
Deferred tax assets:    
Net operating loss carryforwards $ 36,594 $ 34,217
Accrued expenses and reserves 30,690 29,884
Book over tax depreciation of property and equipment 28,868 19,881
Alternative minimum tax credit carryforwards 3,330 3,330
General business tax credit carryforwards 2,666 2,095
Capital loss carryforwards 2,510  
Stock awards 1,315 1,177
Unrealized loss on commodity hedges 1,115 1,852
Other 1,496 964
Total deferred tax assets 108,584 93,400
Less: valuation allowance (84,540) (70,352)
Total deferred tax assets after valuation allowance 24,044 23,048
Deferred tax liabilities:    
Amortization of intangibles (28,210) (25,973)
Other (286) (143)
Total deferred tax liabilities (28,496) (26,116)
Net deferred tax liability $ (4,452) $ (3,068)