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Indebtedness - Senior Subordinated Notes and Early Extinguishment of Debt - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended
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Jun. 30, 2014 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 Subordinated Debt | May 27, 2014 8.0% Senior Subordinated notes due 2019 | Sep. 30, 2014 8.0% Senior Subordinated notes due 2019
Debt Instrument [Line Items] |  |  |  |  |  |
Maximum redemption price of notes as percentage of principal amount |  |  |  | 101.00% | 104.00% |
Announced call for redemption amount of debt |  |  |  |  | $ 300,000,000 |
Debt instrument, redemption description |  |  |  |  |  | On May 27, 2014, we announced a call for the redemption of $300.0 million of our outstanding 8.0% senior subordinated notes due 2019 at 104.0% of par plus accrued and unpaid interest, which were redeemed on June 26, 2014.
Loss on early extinguishment of debt | $ 24,600,000 | $ 24,596,000 | $ 12,280,000 |  |  |

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- Definition Description of debt redemption features under terms of the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Gross amount of debt extinguished. + References No definition available. + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 + Details
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