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Derivatives (Activity In Accumulated Other Comprehensive Income (Loss) Related To Interest Rate Swaps) (Details) (USD $) In Thousands | 3 Months Ended | 6 Months Ended
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Mar. 31, 2011 | Mar. 31, 2010 | Jun. 30, 2011 | Jun. 30, 2010
Derivatives |  |  |  |
Accumulated other comprehensive loss resulting from interest rate swaps as of January 1 | $ (9,492) | $ (5,367) | $ (9,492) | $ (5,367)
Other comprehensive income (loss) recognized during three month period ended June 30 | (308) | (5,942) | (186) | (3,596)
Accumulated other comprehensive loss resulting from interest rate swaps as of June 30 | $ (9,800) | $ (11,309) |  |

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- Definition Accumulated other comprehensive loss resulting from interest rate swaps net of tax + Details
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- Definition Change in accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges, net of tax effect. The after tax effect change includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 17, 20 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 121 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 46 + Details
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