Long-Term Debt And Loans Payable (Schedule Of Long-Term Debt Future Sinking Fund Payments And Debt Maturities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Debt Instrument [Line Items]
2012	$ 42,553
2013	34,849
2014	86,089
2015	63,690
2016	35,314
Thereafter	1,215,841
Long-Term Debt Interest Rate Range 0.00% To 0.99% [Member]
Debt Instrument [Line Items]
2012	367
2013	367
2014	365
2015	368
2016	366
Thereafter	4,944
Interest Rate Range, Minimum	0.00%
Interest Rate Range, Maximum	0.99%
Long-Term Debt Interest Rate Range 1.00% To 1.99% [Member]
Debt Instrument [Line Items]
2012	2,177
2013	2,469
2014	2,336
2015	2,292
2016	2,206
Thereafter	18,550
Interest Rate Range, Minimum	1.00%
Interest Rate Range, Maximum	1.99%
Long-Term Debt Interest Rate Range 2.00% To 2.99% [Member]
Debt Instrument [Line Items]
2012	805
2013	819
2014	836
2015	864
2016	884
Thereafter	8,590
Interest Rate Range, Minimum	2.00%
Interest Rate Range, Maximum	2.99%
Long-Term Debt Interest Rate Range 3.00% To 3.99% [Member]
Debt Instrument [Line Items]
2012	2,105
2013	2,173
2014	2,247
2015	2,325
2016	2,397
Thereafter	15,346
Interest Rate Range, Minimum	3.00%
Interest Rate Range, Maximum	3.99%
Long-Term Debt Interest Rate Range 4.00% To 4.99% [Member]
Debt Instrument [Line Items]
2012	233
2013	21,839
2014	27,246
2015	258
2016	11,065
Thereafter	499,585
Interest Rate Range, Minimum	4.00%
Interest Rate Range, Maximum	4.99%
Long-Term Debt Interest Rate Range 5.00% To 5.99% [Member]
Debt Instrument [Line Items]
2012	31,447
2013	499
2014	51,604
2015	44,069
2016	16,817
Thereafter	526,824
Interest Rate Range, Minimum	5.00%
Interest Rate Range, Maximum	5.99%
Long-Term Debt Interest Rate Range 6.00% To 6.99% [Member]
Debt Instrument [Line Items]
2012
2013
2014
2015	12,000
2016
Thereafter	51,253
Interest Rate Range, Minimum	6.00%
Interest Rate Range, Maximum	6.99%
Long-Term Debt Interest Rate Range 7.00% To 7.99% [Member]
Debt Instrument [Line Items]
2012	1,115
2013	447
2014	379
2015	409
2016	442
Thereafter	26,203
Interest Rate Range, Minimum	7.00%
Interest Rate Range, Maximum	7.99%
Long-Term Debt Interest Rate Range 8.00% To 8.99% [Member]
Debt Instrument [Line Items]
2012	244
2013	349
2014	376
2015	405
2016	437
Thereafter	32,146
Interest Rate Range, Minimum	8.00%
Interest Rate Range, Maximum	8.99%
Long-Term Debt Interest Rate Range 9.00% To 9.99% [Member]
Debt Instrument [Line Items]
2012	4,060
2013	5,887
2014	700
2015	700
2016	700
Thereafter	26,400
Interest Rate Range, Minimum	9.00%
Interest Rate Range, Maximum	9.99%
Long-Term Debt Interest Rate Range 10.00% To 10.99% [Member]
Debt Instrument [Line Items]
2012
2013
2014
2015
2016
Thereafter	$ 6,000
Interest Rate Range, Minimum	10.00%
Interest Rate Range, Maximum	10.99%

When presenting a range of interest rates, the highest stated (contractual) rate for funds borrowed under the debt agreement as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: 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(a)(1))

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- Definition

When presenting a range of interest rates, the lowest stated (contractual) rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: 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(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of long-term debt maturities after year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

+ References

Reference 1: 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.

Reference 2: 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

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- Definition

Amount of long-term debt maturing within the next twelve months following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates.

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Amount of long-term debt maturing in year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing in year four following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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- Definition

Amount of long-term debt maturing in year three following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing in year two following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates.

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