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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended |  | 1 Months Ended | 2 Months Ended |  |  |  |  |
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Jun. 30, 2011 Howard Midstream Energy Partners, LLC. [Member] | Apr. 30, 2012 Howard Midstream Energy Partners, LLC. [Member] | Jun. 22, 2011 Howard Midstream Energy Partners, LLC. [Member] | Dec. 31, 2012 Minimum [Member] | Dec. 31, 2012 Maximum [Member] | Dec. 31, 2012 Fiber Optic Licensing [Member] | Dec. 31, 2011 Fiber Optic Licensing [Member] | Dec. 31, 2012 Internally Developed Software [Member] | Dec. 31, 2011 Internally Developed Software [Member]
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired ownership interest in HEP |  |  |  |  |  | 31.00% | 39.00% | 20.00% | 50.00% |  |  |  |
Cash and cash equivalents | $ 394,701,000 | $ 315,349,000 | $ 539,221,000 | $ 699,629,000 |  |  |  |  |  |  |  |  |
Cash equivalents | 92,500,000 | 165,900,000 |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents held in domestic bank accounts | 254,100,000 | 230,900,000 |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents held in foreign bank accounts | 140,600,000 | 84,400,000 |  |  |  |  |  |  |  |  |  |  |
Number of days after accounts receivable are treated as delinquent | 30 days |  |  |  |  |  |  |  |  |  |  |  |
Number of days related to outstanding accounts receivable for analysis of the allowance for doubtful accounts | At least 90 days |  |  |  |  |  |  |  |  |  |  |  |
Total allowances for doubtful accounts | 5,447,000 | 3,751,000 | 5,962,000 |  |  |  |  |  |  |  |  |  |
Current retainage balances | 180,600,000 | 111,900,000 |  |  |  |  |  |  |  |  |  |  |
Non-current retainage balances | 22,500,000 | 28,300,000 |  |  |  |  |  |  |  |  |  |  |
Unbilled receivables | 127,500,000 | 121,100,000 |  |  |  |  |  |  |  |  |  |  |
Depreciation expense related to property and equipment | 120,303,000 | 109,874,000 | 101,199,000 |  |  |  |  |  |  |  |  |  |
Construction work-in-progress | 33,546,000 | 29,502,000 |  |  |  |  |  |  |  | 19,000,000 | 14,100,000 | 2,100,000 | 8,000,000
Net property and equipment reclassified to prepaid expenses and other current assets and deemed assets held for sale |  |  | 8,200,000 |  |  |  |  |  |  |  |  |  |
Net losses from the impairment of assets held for sale |  |  | 100,000 |  |  |  |  |  |  |  |  |  |
Debt issuance costs related to amendment |  | 4,127,000 |  |  |  |  |  |  |  |  |  |  |
Debt issuance cost write off |  | 300,000 |  |  |  |  |  |  |  |  |  |  |
Capitalized debt issuance costs | 4,400,000 | 4,400,000 |  |  |  |  |  |  |  |  |  |  |
Accumulated amortization of debt issuance costs | 1,300,000 | 400,000 |  |  |  |  |  |  |  |  |  |  |
Amortization expense related to capitalized debt issuance costs | 904,000 | 901,000 | 642,000 |  |  |  |  |  |  |  |  |  |
Decrease in fair value of reporting units considered, for impairment calculation | 10.00% |  |  |  |  |  |  |  |  |  |  |  |
Payment to acquire equity method investments | (53,750,000) | (35,000,000) |  |  | (35,000,000) | (52,300,000) |  |  |  |  |  |  |
Number of shares acquired in equity method investment |  |  |  |  |  | 45,435 |  |  |  |  |  |  |
Change orders and/or claims | 205,000,000 | 77,300,000 |  |  |  |  |  |  |  |  |  |  |
Fiber Optic Licensing Terms, Minimum in years | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Fiber Optic Licensing Terms, Maximum in years | 25 years |  |  |  |  |  |  |  |  |  |  |  |
Fiber optic deferred revenue | 46,400,000 | 47,400,000 |  |  |  |  |  |  |  |  |  |  |
Fiber optic non-current deferred revenue | 37,700,000 | 38,300,000 |  |  |  |  |  |  |  |  |  |  |
Total amount of unrecognized tax benefits relating to uncertain tax positions | 51,244,000 | 47,379,000 | 50,632,000 | 45,201,000 |  |  |  |  |  |  |  |  |
Expected increase in amount due to tax position | 15,411,000 | 10,133,000 | 10,602,000 |  |  |  |  |  |  |  |  |  |
Decrease in amount due to the expiration of certain statutes of limitations | 11,965,000 | 8,640,000 | 10,261,000 |  |  |  |  |  |  |  |  |  |
Amount expected to decrease due to settlements of audits or as a result of the expiration of certain statutes of limitations | $ 11,479,000 | $ 12,110,000 | $ 8,786,000 |  |  |  |  |  |  |  |  |  |

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- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -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 The estimated upper bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition The amount of costs incurred on unapproved change orders when it is probable that the cost will be recovered through a change in the contract price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph c(3) -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 910 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6471523&loc=d3e50000-109363 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 910 -SubTopic 310 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6471494&loc=d3e49324-109356 + Details
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- Definition The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a -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 gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(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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