Debt - Maturities Of Debt (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Long-term Debt, Fiscal Year Maturity [Abstract]
2015	$ 12,647,000
2016	119,128,000
2017	440,000
2018	474,000
2019	498,000
Thereafter	661,706,000
Total payments	794,893,000us-gaap_DebtInstrumentCarryingAmount
Less: Amount representing estimated executory costs	(432,000)
Less: Amounts representing interest	(30,000)
Net principal payments	794,431,000us-gaap_DebtAndCapitalLeaseObligations	793,559,000us-gaap_DebtAndCapitalLeaseObligations
Senior Notes [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2015	0
2016	0
2017	0
2018	0
2019	0
Thereafter	649,636,000
Total payments	649,636,000
Less: Amount representing estimated executory costs	0
Less: Amounts representing interest	0
Net principal payments	649,636,000
Capital Lease [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2015	1,017,000
2016	594,000
2017	0
2018	0
2019	0
Thereafter	0
Total payments	1,611,000
Less: Amount representing estimated executory costs	(432,000)
Less: Amounts representing interest	(30,000)
Net principal payments	1,149,000	1,848,000
Revolving Credit Facilities [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2015	11,250,000
2016	118,125,000
2017	0
2018	0
2019	0
Thereafter	0
Total payments	129,375,000
Less: Amount representing estimated executory costs	0
Less: Amounts representing interest	0
Net principal payments	129,375,000
Other Notes Payable [Member]
Long-term Debt, Fiscal Year Maturity [Abstract]
2015	380,000
2016	409,000
2017	440,000
2018	474,000
2019	498,000
Thereafter	12,070,000
Total payments	14,271,000
Less: Amount representing estimated executory costs	0
Less: Amounts representing interest	0
Net principal payments	$ 14,271,000

Amounts to be paid by lessee to lessor for maintenance, insurance, and tax expenses related to the leased asset.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond 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 20

-Article 5

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-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Reference 1: 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 3

-Subparagraph (SX 210.12-04.(a))

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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