Share-Based Compensation Plan - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |
9 Months Ended | |
---|---|---|
Feb. 09, 2016 |
Sep. 30, 2016 |
|
Class Of Stock [Line Items] | ||
Expected vesting percentage | 20.00% | |
Performance Awards [Member] | ||
Class Of Stock [Line Items] | ||
Share price for vesting | $ 19.58 | |
Performance Awards [Member] | Minimum [Member] | ||
Class Of Stock [Line Items] | ||
Aggregate percentage of performance awards | 1.4909% | |
2016 VSEP [Member] | ||
Class Of Stock [Line Items] | ||
Compensation fully earned and vested description | Awards made under the 2016 VSEP, if earned, may result in the granting of common shares of DDR and time-vested restricted stock units (“RSUs”) to participants on future measurement dates based on a performance period beginning on February 9, 2016, and ending on December 31, 2018 (the “Performance Period”). As a result, in general, the total compensation available to participants under the 2016 VSEP, if any, will be fully earned only after approximately seven years (the Performance Period and the final four-year time-based vesting period for RSUs). | |
Vesting period | 7 years | |
Settlement percentage of common shares | 20.00% | |
Settlement percentage of restricted stock units | 80.00% | |
Total unrecognized compensation cost granted | $ 3.6 | |
Term of recognition of unrecognized stock option compensation cost | 6 years 3 months | |
2016 VSEP [Member] | Minimum [Member] | ||
Class Of Stock [Line Items] | ||
Share price for vesting | $ 17.41 | |
2016 VSEP [Member] | Maximum [Member] | ||
Class Of Stock [Line Items] | ||
Share price for vesting | $ 25.35 | |
2016 VSEP [Member] | Time-based Vesting [Member] | ||
Class Of Stock [Line Items] | ||
Vesting period | 4 years |