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Equity and Capital - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  | $ (26,256) | $ 4,558
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Beginning balance |  |  | (58,650) | (57,748)
Current period other comprehensive income, net |  |  | (21,382) | 8,979
Ending balance | $ (80,032) | $ (48,769) | (80,032) | (48,769)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  | 4,874 | 4,421
Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  | 0 |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Beginning balance |  |  | 0 | 0
Current period other comprehensive income, net |  |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  | 0 | 0
AOCI Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  | (375) | (64)
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Beginning balance |  |  | (785) | (750)
Current period other comprehensive income, net |  |  | (297) | 15
Ending balance | (1,082) | (735) | (1,082) | (735)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  | 78 | 79
AOCI Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  | (26,594) | 4,464
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Beginning balance |  |  | (59,478) | (58,498)
Current period other comprehensive income, net |  |  | (21,642) | 8,964
Ending balance | (81,120) | (49,534) | (81,120) | (49,534)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 2,500 | 2,250 | 4,952 | 4,500
Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  | 37 | (30)
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Beginning balance |  |  | (43) | 0
Current period other comprehensive income, net |  |  | 37 | (30)
Ending balance | (6) | (30) | (6) | (30)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  | 0 | 0
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  | (26,219) | 4,528
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Beginning balance |  |  | (58,693) | (57,748)
Current period other comprehensive income, net |  |  | (21,345) | 8,949
Ending balance | (80,038) | (48,799) | (80,038) | (48,799)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  | 4,874 | 4,421
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  | (375) | (64)
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Beginning balance |  |  | (785) | (750)
Current period other comprehensive income, net |  |  | (297) | 15
Ending balance | (1,082) | (735) | (1,082) | (735)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  | 78 | 79
Partnership Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Beginning balance |  |  | (58,693) |
Current period other comprehensive income, net | (7,273) | $ 20,596 | (21,642) | 8,964
Ending balance | $ (80,038) |  | (80,038) |
Partnership Interest [Member] | General Partner [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Current period other comprehensive income, net |  |  | 0 | 0
Partnership Interest [Member] | Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |  |
Current period other comprehensive income, net |  |  | $ (21,345) | $ 8,949

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: 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=36458714&loc=d3e637-108580 Reference 2: 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=36458714&loc=d3e681-108580 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=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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