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Long-Term Debt (Net Interest Expense) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Debt Disclosure [Abstract] |  |
Interest expense | $ 8,409 us-gaap_InterestExpense | $ 8,362 us-gaap_InterestExpense
Interest income | (650)us-gaap_InterestIncomeOther | (717)us-gaap_InterestIncomeOther
Capitalized interest | (3,689)us-gaap_InterestCostsCapitalized | (3,162)us-gaap_InterestCostsCapitalized
Net interest expense | $ 4,070 us-gaap_InterestIncomeExpenseNonoperatingNet | $ 4,483 us-gaap_InterestIncomeExpenseNonoperatingNet

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- Details
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- Definition Amount of interest capitalized during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Allowance for Funds Used during Construction -URI http://asc.fasb.org/extlink&oid=6504829 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 + Details
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- Definition The net amount of nonoperating interest income (expense). + References No definition available. + Details
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- Definition Amount of interest income earned from interest bearing assets not separately disclosed. + References No definition available. + Details
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