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Earnings Per Share - Summary of Basic and Diluted EPS (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Sep. 30, 2012 | Jul. 01, 2012 | Apr. 01, 2012 | Jan. 01, 2012 | Sep. 30, 2011 | Jul. 03, 2011 | Apr. 03, 2011 | Jan. 02, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Income (loss) attributable to common and participating preferred stockholders: |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | $ 29,915 | $ 22,226 | $ (149,134)
(Loss) income from discontinued operations |  |  |  |  |  |  |  |  |  |  | (2,735)
Net income (loss) attributable to common and participating preferred stockholders | 159,091 | (149,080) | (3,855) | 23,759 | (107,095) | 211,341 | (61,950) | (20,070) | 29,915 | 22,226 | (151,869)
Participating shares at end of period: |  |  |  |  |  |  |  |  |  |  |
Common stock outstanding |  |  |  |  |  |  |  |  | 139,357 | 139,346 | 139,197
Preferred stock (as-converted basis) |  |  |  |  |  |  |  |  | 62,839 | 60,989 |
Total |  |  |  |  |  |  |  |  | 202,196 | 200,335 | 139,197
Percentage of income (loss) allocated to: |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  | 68.90% | 69.60% | 100.00%
Preferred stock |  |  |  |  |  |  |  |  | 31.10% | 30.40% |
Income (loss) attributable to common shares - basic: |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | 20,618 | 15,460 | (149,134)
(Loss) income from discontinued operations |  |  |  |  |  |  |  |  |  |  | (2,735)
Net income (loss) |  |  |  |  |  |  |  |  | 20,618 | 15,460 | (151,869)
Dilutive adjustments to income (loss) attributable to common stock from assumed conversion of preferred stock, net of tax: |  |  |  |  |  |  |  |  |  |  |
Income allocated to preferred stock in basic calculation |  |  |  |  |  |  |  |  |  | 6,766 |
Reversal of preferred stock dividends and accretion |  |  |  |  |  |  |  |  |  | 19,833 |
Reversal of income related to fair value of preferred stock conversion feature |  |  |  |  |  |  |  |  |  | (27,910) |
Net adjustment |  |  |  |  |  |  |  |  |  | (1,311) |
Income (loss) attributable to common shares - diluted: |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | 20,618 | 14,149 | (149,134)
Loss from discontinued operations |  |  |  |  |  |  |  |  |  |  | (2,735)
Net income (loss) |  |  |  |  |  |  |  |  | $ 20,618 | $ 14,149 | $ (151,869)
Weighted-average common shares outstanding - basic |  |  |  |  |  |  |  |  | 139,356 | 139,233 | 132,399
Dilutive effect of preferred stock |  |  |  |  |  |  |  |  |  | 19,064 |
Dilutive effect of stock options |  |  |  |  |  |  |  |  | 81 | 87 |
Dilutive effect of restricted stock and restricted stock units |  |  |  |  |  |  |  |  | 381 |  |
Weighted-average shares outstanding - diluted |  |  |  |  |  |  |  |  | 139,818 | 158,384 | 132,399
Basic income (loss) per common share attributable to controlling interest: |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  |  |  |  |  |  |  |  | $ 0.15 | $ 0.11 | $ (1.13)
Discontinued operations |  |  |  |  |  |  |  |  |  |  | $ (0.02)
Net income (loss) | $ 0.79 | $ (1.07) | $ (0.02) | $ 0.12 | $ (0.77) | $ 1.16 | $ (0.45) | $ (0.14) | $ 0.15 | $ 0.11 | $ (1.15)
Diluted income (loss) per common share attributable to controlling interest: |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  |  |  |  |  |  |  |  | $ 0.15 | $ 0.09 | $ (1.13)
Discontinued operations |  |  |  |  |  |  |  |  |  |  | $ (0.02)
Net income (loss) | $ 0.78 | $ (1.07) | $ (0.02) | $ 0.06 | $ (0.77) | $ 1.16 | $ (0.45) | $ (0.14) | $ 0.15 | $ 0.09 | $ (1.15)

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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 9 -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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