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Derivative Instruments And Hedging Activities - Narrative (Details) $ in Thousands, NOK in Millions | 1 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2015 NOK | Jun. 30, 2015 USD ($) | Sep. 30, 2013 USD ($) | Feb. 28, 2013 USD ($) | Feb. 28, 2013 NOK | Jan. 31, 2013 USD ($) | Jan. 31, 2013 NOK
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrealized loss on hedges, net | $ 27,891 | $ 18,021 | $ 27,891 |  |  |  |  |  |  |  |
Unrealized losses related to foreign exchange contracts | 18,000 |  |  |  |  |  |  |  |  |  |
Loss in Accumulated OCI to be reclassified within twelve months |  | 9,600 |  |  |  |  |  |  |  |  |
Grand Canyon [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  | $ 104,600 | NOK 591.3
Grand Canyon II [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  | NOK 434.1 |  |  | $ 100,400 | NOK 594.7 |  |
Grand Canyon III [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  | NOK 185.2 |  |  | $ 98,800 | NOK 595.0 |  |
Interest Rate Swaps [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | $ 148,100 |  |  |  |
Interest Rate Swaps [Member] | Nordea Q5000 Loan Maturing April 2020 [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 187,500 |  |  |  |  |
Cash Flow Hedging [Member] | Foreign Exchange Contracts [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrealized loss on hedges, net | $ 19,800 |  | 19,800 |  |  |  |  |  |  |  |
Other Income (Expense), Net [Member] | Grand Canyon [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Realized loss on hedge ineffectiveness |  | (100) |  |  |  |  |  |  |  |  |
Unrealized loss on hedge ineffectiveness |  | $ 0 | 1,500 |  |  |  |  |  |  |  |
Other Income (Expense), Net [Member] | Grand Canyon II [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Realized loss on hedge ineffectiveness |  |  |  | $ 500 |  |  |  |  |  |  |
Unrealized loss on hedge ineffectiveness |  |  |  | $ 1,200 |  |  |  |  |  |  |
Other Income (Expense), Net [Member] | Grand Canyon II and Grand Canyon III [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Realized loss on hedge ineffectiveness |  |  | $ 3,600 |  |  |  |  |  |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80784-113994 + Details
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