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Equity and Capital - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  | $ 12
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | $ 13,156 | $ (3,770) |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (6,262) | (18,327) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 3,513 | 5,638 |
Current period other comprehensive income, net | 16,669 | 1,868 |
Ending balance | 10,419 | (16,459) |
Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  | 0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | (75) | 43 |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (27) | (19) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 0 | 0 |
Current period other comprehensive income, net | (75) | 43 |
Ending balance | (102) | 24 |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  | 12
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 13,081 | (3,727) |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (6,289) | (18,346) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 3,513 | 5,638 |
Current period other comprehensive income, net | 16,594 | 1,911 |
Ending balance | 10,317 | (16,435) |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  | 2
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 638 | (103) |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (112) | (301) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 40 | 88 |
Current period other comprehensive income, net | 678 | (15) |
Ending balance | 568 | (316) |
Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  | 0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 0 | 0 |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | 0 | 0 |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 0 | 0 |
Current period other comprehensive income, net | 0 | 0 |
Ending balance | 0 | 0 |
AOCI Attributable to Noncontrolling Interest [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  | 2
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 638 | (103) |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (112) | (301) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 40 | 88 |
Current period other comprehensive income, net | 678 | (15) |
Ending balance | 568 | (316) |
AOCI Including Portion Attributable to Noncontrolling Interest [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  | $ 14
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 13,719 | (3,830) |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (6,401) | (18,647) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 3,553 | 5,726 |
Current period other comprehensive income, net | 17,272 | 1,896 |
Ending balance | 10,885 | $ (16,751) |
Accounting Standards Update 2017-12 [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (6,250) |  |
Accounting Standards Update 2017-12 [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (27) |  |
Accounting Standards Update 2017-12 [Member] | Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (6,277) |  |
Accounting Standards Update 2017-12 [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (110) |  |
Accounting Standards Update 2017-12 [Member] | Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | 0 |  |
Accounting Standards Update 2017-12 [Member] | AOCI Attributable to Noncontrolling Interest [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | (110) |  |
Accounting Standards Update 2017-12 [Member] | AOCI Including Portion Attributable to Noncontrolling Interest [Member] |  |  |
Accumulated Other Comprehensive Income Loss [Roll Forward] |  |  |
Beginning balance | $ (6,387) |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580 + Details
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