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Long-Term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 0 Months Ended | 1 Months Ended |  | 0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended |  |
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Mar. 14, 2014 Senior Secured Notes [Member] | Nov. 30, 2011 Senior Secured Notes [Member] | Mar. 31, 2014 Senior Secured Notes [Member] | Apr. 12, 2011 Senior Secured Notes [Member] Private Placement [Member] | Mar. 31, 2014 Senior Secured Notes [Member] Private Placement [Member] | Apr. 12, 2011 Senior Secured Credit Note [Member] | Apr. 12, 2011 Subordinated Note [Member] | Mar. 31, 2014 Senior Secured Notes [Member] | Mar. 31, 2013 Senior Secured Notes [Member] | Mar. 14, 2014 November Two Thousand Eleven Senior Notes [Member] | Nov. 30, 2011 November Two Thousand Eleven Senior Notes [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Issuance of private placement, principal amount |  |  |  | $ 200.0 |  |  |  |  |  |  |
Interest rate |  |  | 8.75% | 8.75% |  |  |  |  |  |  |
Retirement of notes, principal amount |  |  |  |  |  | 22.4 | 100.0 |  |  |  |
Cost to issue the notes |  |  |  | 4.6 |  |  |  |  |  |  |
Term of payments of interest on notes |  |  |  |  | Semi-annually |  |  |  |  |  |
Private placement date |  |  |  | Apr. 12, 2011 |  |  |  |  |  |  |
Total amount of debt to be retired | 50.0 |  |  |  |  |  |  |  |  | 5.0 |
Percentage of debt to be retired from the total debt | 25.00% |  |  |  |  |  |  |  |  |  |
Aggregate face amount of debt redeemed | 45.0 |  |  |  |  |  |  |  |  |  |
Redemption price as a percentage of face amount | 106.563% |  |  |  |  |  |  |  |  |  |
Aggregate face amount of debt redeemed |  |  |  |  |  |  |  |  |  |  | 4.7
Outstanding principal amount of the debt |  | 150.0 |  |  |  |  |  |  |  |  |
Annual interest cost reduction due to retirement of debt |  | 3.9 |  |  |  |  |  |  |  |  |
Interest expense on note |  |  |  |  |  |  |  | $ 4.3 | $ 4.3 |  |

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + 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 Aggregate amount of interest paid or due on all long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.8) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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