Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
|
| Supplemental Cash Flow Elements [Abstract] | ||
| Reduction of debt through sale of certain real estate properties | $ 30,555 | $ 5,001 |
| Reduction of debt in exchange for collateral assets | 7,904 | 0 |
| Net real estate and other collateral assets surrendered to lender | 7,384 | 0 |
| Accrued interest capitalized to principal | 4,686 | 997 |
| Accrued performance share dividend rights | $ 459 | $ 420 |