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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Apr. 30, 2013 | Apr. 30, 2012 | Apr. 30, 2011
Cash Flows from Operating Activities: |  |  |
Net (loss) income | $ (54,463) | $ (77,592) | $ 38,428
Adjustments to reconcile net (loss) income to net cash provided by operating activities - |  |  |
Loss from discontinued operations, net of tax | 4,480 | 614 | 2,198
Gain on disposal of discontinued operations, net of tax |  | (725) | (43,590)
Gain on sale of assets |  |  | (3,502)
Gain on sale of property and equipment | (407) | (1,004) | (470)
Depreciation and amortization | 56,576 | 58,415 | 58,121
Depletion of landfill operating lease obligations | 9,372 | 8,482 | 7,878
Interest accretion on landfill and environmental remediation liabilities | 3,675 | 3,479 | 3,331
Asset impairment charge |  | 40,746 | 3,654
Environmental remediation charge |  |  | 549
Bargain purchase gain |  |  | (2,975)
Development project charge |  | 131 |
Amortization of premium on redeemed senior subordinated notes |  |  | (611)
Amortization of discount on second lien notes and senior subordinated notes | 626 | 964 | 801
Loss from equity method investments | 4,441 | 9,994 | 4,096
Impairment of equity method investment |  | 10,680 |
Loss on derivative instruments, net | 4,512 |  |
Loss on debt extinguishment | 15,584 | 300 | 7,390
Stock-based compensation and related severance expense | 2,516 | 1,855 | 1,592
Excess tax benefit on the vesting of share based awards | (96) | (254) | (129)
Deferred income taxes | (3,543) | 1,824 | (23,124)
Changes in assets and liabilities, net of effects of acquisitions and divestitures - |  |  |
Accounts receivable | 139 | 7,442 | (3,273)
Accounts payable | 4,152 | 4,210 | 7,443
Prepaid expenses, inventories and other assets | 4,056 | 336 | 3,861
Accrued expenses and other liabilities | (7,759) | (5,726) | (13,459)
Net cash provided by operating activities | 43,861 | 64,171 | 48,209
Cash Flows from Investing Activities: |  |  |
Acquisitions, net of cash acquired | (25,225) | (2,102) | (1,744)
Additions to property, plant and equipment - acquisitions | (1,746) | (529) | (5)
Additions to property, plant and equipment - growth | (12,192) | (12,211) | (2,803)
Additions to property, plant and equipment - maintenance | (40,823) | (45,463) | (51,780)
Payments on landfill operating lease contracts | (6,261) | (6,616) | (5,655)
Payment for capital related to divestiture | (618) |  |
Investments in unconsolidated entities | (3,207) | (5,045) |
Purchase of gas rights |  |  | (1,608)
Proceeds from sale of assets |  |  | 7,533
Proceeds from sale of property and equipment | 883 | 1,492 | 959
Net cash used in investing activities | (89,189) | (70,474) | (55,103)
Cash Flows from Financing Activities: |  |  |
Proceeds from long-term borrowings | 376,346 | 163,500 | 383,757
Principal payments on long-term debt | (360,858) | (152,806) | (491,669)
Payment of tender premium and costs on second lien notes | (10,743) |  |
Payments of financing costs | (4,609) | (1,592) | (10,588)
Net proceeds from the sale of Class A common stock | 42,184 |  |
Proceeds from the exercise of share based awards |  | 337 | 476
Excess tax benefit on the vesting of share based awards | 96 | 254 | 129
Contributions from noncontrolling interest holders | 2,531 | 536 |
Net cash provided by (used in) financing activities | 44,947 | 10,229 | (117,895)
Discontinued Operations: |  |  |
Net cash used in operating activities | (1,037) | (396) | (1,477)
Net cash (used in) provided by investing activities | (1,361) | (813) | 129,453
Net cash used in financing activities |  |  | (3,405)
Net cash (used in) provided by discontinued operations | (2,398) | (1,209) | 124,571
Net (decrease) increase in cash and cash equivalents | (2,779) | 2,717 | (218)
Cash and cash equivalents, beginning of period | 4,534 | 1,817 | 2,035
Cash and cash equivalents, end of period | 1,755 | 4,534 | 1,817
Cash (refunded) paid during the period for - |  |  |
Interest | 41,348 | 40,710 | 43,923
Income taxes, net of refunds | (253) | 5,048 | 1,480
Summary of entities acquired in purchase business combinations - |  |  |
Fair value of net assets acquired and goodwill | 27,908 | 2,217 | 6,456
Common stock issued | 2,650 |  |
Bargain purchase gain |  |  | 2,975
Cash paid, net of cash acquired | 25,225 | 2,102 | 1,744
Notes payable, liabilities assumed and holdbacks to sellers | 33 | 115 | 1,737
Equipment contributed by noncontrolling interest holder |  | $ 1,270 |

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- Definition The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 170 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 147, 148, 149, 150 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 90-8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 143 -Paragraph 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount of net cash from (used in) the entity's investing activities, excluding cash flows derived by the entity from its discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 -Footnote 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3574-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount of net cash from (used in) the entity's continuing operations, excluding cash flows derived by the entity from its discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 -Footnote 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3521-108585 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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