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Debt (Subordinated Debt Joint Venture Partners Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2012
Debt Instrument [Line Items] |  |  |
Long-term Debt | $ 29,806,843 | $ 30,402,392 |
Subordinated Debt Joint Ventures Partners [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 0.00% |  |
Interest rate paid on unpaid interest | 19.50% |  |
Subordinated Debt Joint Ventures Partners Before Amendment [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate |  |  | 20.00%
Minimum [Member] | Subordinated Debt Joint Ventures Partners [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 15.00% |  |
Subordinated Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt | $ 1,564,045 | 1,064,042 |
Subordinated Debt [Member] | Subordinated Debt Joint Ventures Partners [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt | $ 64,280 | $ 64,280 |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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