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Commitments and Contingencies (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 16, 2015 | May 31, 2014 | Jun. 30, 2013 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015 | Dec. 31, 2010
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Debt satisfaction gains (charges), net |  |  |  | $ 2,538,000 | $ (398,000) | $ (818,000) | $ 13,753,000 |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt instrument |  |  |  | 500,000,000 |  | 500,000,000 |  | $ 500,000,000 |
Senior Notes [Member] | Senior Notes Due 2024 [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt instrument |  |  |  | $ 250,000,000 |  | $ 250,000,000 |  | $ 250,000,000 |
Debt instrument, interest rate, stated percentage |  |  |  | 4.40% |  | 4.40% |  | 4.40% |
Senior Notes [Member] | Senior Notes Due 2023 [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt instrument |  |  |  | $ 250,000,000 |  | $ 250,000,000 |  | $ 250,000,000 |
Debt instrument, interest rate, stated percentage |  |  |  | 4.25% |  | 4.25% |  | 4.25% |
6% Convertible Guaranteed Note [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  | 6.00% | 6.00% | 6.00% | 6.00% |  |
LCIF [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Debt satisfaction gains (charges), net |  |  |  | $ (5,773,000) | $ 0 | $ (7,388,000) | $ (33,000) |  |
LCIF [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  | 6.50% |  | 6.50% |  |  |
LCIF [Member] | Senior Notes [Member] | Senior Notes Due 2024 [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt instrument |  | $ 250,000,000 |  |  |  |  |  |  |
Debt instrument, redemption price, percentage |  | 99.883% |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 4.40% |  |  |  |  |  |  |
LCIF [Member] | Senior Notes [Member] | Senior Notes Due 2023 [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt instrument |  |  | $ 250,000,000 |  |  |  |  |  |
Debt instrument, redemption price, percentage |  |  | 99.026% |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 4.25% |  |  |  |  |  |
LCIF [Member] | 6% Convertible Guaranteed Note [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt instrument |  |  |  |  |  |  |  |  | $ 115,000,000
Debt instrument, interest rate, stated percentage |  |  |  |  |  |  |  |  | 6.00%
Bridgewater Hills Corporate Center, LLC [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Damages sought, value | $ 15,500,000 |  |  |  |  |  |  |  |
Debt satisfaction gains (charges), net |  |  |  |  |  | $ 8,761,000 |  |  |
Bridgewater Hills Corporate Center, LLC [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Estimate of possible loss (shall not exceed) | $ 10,000,000 |  |  |  |  |  |  |  |

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