Shareholders' Equity And Net Income Per Share Other (Details) - USD ($) |
11 Months Ended | 12 Months Ended |
|---|---|---|
Nov. 22, 2011 |
Dec. 31, 2015 |
|
| Shareholders' Equity and Net Income Per Share [Line Items] | ||
| Initial Offering Period | November 22, 2011 | |
| Unsecured Creditors Litigation | Pending Litigation | ||
| Shareholders' Equity and Net Income Per Share [Line Items] | ||
| Loss Contingency, Damages Sought, Value Per Unit in Excess of Benchmark | $ 32.50 | |
| Loss Contingency, Damages Sought, Unit in Excess of Benchmark | 67.50 | |
| Loss Contingency, Range of Possible Loss, Maximum | 300,000,000 | |
| Loss Contingency Accrual | 0 | |
| Unsecured Creditors Litigation | Litigation, Damages Benchmark, Fourth LLP Agreement | Pending Litigation | ||
| Shareholders' Equity and Net Income Per Share [Line Items] | ||
| Cumulative Distributions Threshold | $ 7,200,000,000 |