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v2.3.0.11

Short-Term Loans (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010 | Dec. 31, 2010
Short-Term Loans |  |  |  |  |
Irrevocable letter of credit outstanding amount at the end of period |  |  |  |  | $ 23,500,000
Revolving credit facility outstanding amount at the end of period |  |  |  |  | 53,650,000
Commitment fee paid to maintain credit facility | 5.0 basis points | 2.0 basis points |  |  |
Maximum amount of outstanding short-term loans at any time during the period |  |  | 104,000,000 | 139,700,000 |
Average daily balance of short-term loans outstanding during the period |  |  | $ 11,100,000 | $ 26,600,000 |
Weighted average annual interest rates of average daily balance of short-term loans (as a percent) |  |  | 1.81% | 0.86% |

X
- Definition Amount outstanding under the facility for standby letters of credit as of the balance-sheet date. + Details
Name: | eqt_FinancialStandbyLetterOfCreditAmountOutstanding
Namespace Prefix: | eqt
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This element represents the average percentage of commitment fees paid, which are based on the total availability under the credit facility. + Details
Name: | eqt_LineOfCreditFacilityAverageCommitmentFees
Namespace Prefix: | eqt
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Average amount borrowed under the credit facility during the period. + Details
Name: | us-gaap_LineOfCreditFacilityAverageOutstandingAmount
Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The effective interest during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap
Data Type: | us-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum amount borrowed under the credit facility at any time during the period. + Details
Name: | us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than 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 19 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 2, 3 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Subparagraph a(1) -Article 7 + Details
Name: | us-gaap_ShortTermBorrowings
Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap
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