Subsequent Event (Notes) |
12 Months Ended |
|---|---|
Dec. 31, 2015 | |
| Subsequent Events [Abstract] | |
| Subsequent Events [Text Block] | Subsequent Events On March 8, 2016 the Company's Board of Trustees approved a dividend for the first quarter of 2016 in the amount of $0.45 per share payable on April 25, 2016 to shareholders of record as of March 31, 2016. |