Supplemental Disclosures to the Condensed Consolidated Balance Sheets and Condensed Consolidated Statements of Cash Flows, Cash Flows (Details) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Notes To Financial Statements [Abstract]
Cash payments for interest, net of amounts capitalized	$ 124,173	$ 39,492
Cash payments for income taxes	476	1,681
Noncash investing activities - liabilities assumed
Fair value of assets acquired	850,313	792,242
Cash paid, net of cash acquired	(847,780)	(771,189)
Receivables from sellers	5,855	10,391
Payables to sellers	(5,241)	0
Liabilities assumed	$ 3,147	$ 31,444

The amount of payable to the seller recorded in a business or asset acquisition that was partially a noncash transaction. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or payments.

Name:	line_NoncashOrPartNoncashAcquisitionPayableToSeller
Namespace Prefix:	line
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of receivable from the seller recorded in a business or asset acquisition that was partially a noncash transaction. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or payments.

+ Details

Name:	line_NoncashOrPartNoncashAcquisitionReceivableFromSeller
Namespace Prefix:	line
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	line_NotesToFinancialStatementsAbstract
Namespace Prefix:	line
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale, less deposits for acquisitions.

+ Details

Name:	line_Paymentstoacquireoilandgaspropertyandequipmentlessdeposits
Namespace Prefix:	line
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The fair value of assets acquired in noncash investing or financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 32

+ Details

Name:	us-gaap_FairValueOfAssetsAcquired
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 29

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 27
-Subparagraph f

+ Details

Name:	us-gaap_IncomeTaxesPaid
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of cash paid during the current period for interest owed on money borrowed, net of interest capitalized.

+ References

+ Details

Name:	us-gaap_InterestPaidNet
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The fair value of liabilities assumed in Noncash investing or financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 32

+ Details

Name:	us-gaap_LiabilitiesAssumed
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumedAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration