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Other Long-term Debt - Summary of Scheduled Loan Payments (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
Long term debt payments, 2013 | $ 30,085 |
Long term debt payments, 2014 | 57,890 |
Long term debt payments, 2015 | 79,970 |
Long term debt payments, 2016 | 387 |
Long term debt payments, 2017 | 405 |
Long term debt payments, Thereafter | 5,734 |
Long term debt payments Total | 174,471 | 101,664
Long-term debt payments [Member] |  |
Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
Long term debt payments, 2013 | 29,968 |
Long term debt payments, 2014 | 57,852 |
Long term debt payments, 2015 | 79,970 |
Long term debt payments, 2016 | 387 |
Long term debt payments, 2017 | 405 |
Long term debt payments, Thereafter | 5,734 |
Long term debt payments Total | 174,316 |
Purchase valuation amortization [Member] |  |
Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
Long term debt payments, 2013 | 117 |
Long term debt payments, 2014 | 38 |
Long term debt payments, 2015 | 0 |
Long term debt payments, 2016 | 0 |
Long term debt payments, 2017 | 0 |
Long term debt payments, Thereafter | 0 |
Long term debt payments Total | $ 155 |

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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b -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 Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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