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Capital - Earnings Per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ 33,008 | $ 32,897 | $ 24,640 | $ 16,705 | $ 19,370 | $ 26,085 | $ 26,585 | $ 7,888 | $ 10,964 | $ 22,734 | $ 25,281 | $ 11,231 | $ 107,250 | $ 79,928 | $ 70,210
Private perpetual preferred unit distributions |  |  |  |  |  |  |  |  |  |  |  |  | (936) | (936) | (476)
Earnings allocated to unvested shares |  |  |  |  |  |  |  |  |  |  |  |  | (747) | (550) | (482)
Net income attributable to common unitholders - basic and diluted |  |  |  |  |  |  |  |  |  |  |  |  | $ 105,567 | $ 78,442 | $ 69,252
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average units outstanding - basic and diluted (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 276,848,000 | 265,914,000 | 254,506,000
Effect of dilutive securities, stock-based compensation plans (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 454,000 | 0 | 0
Effect of dilutive securities, exchangeable senior notes (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 266,000 | 0 | 0
Weighted average shares outstanding - diluted (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 277,568,000 | 265,914,000 | 254,506,000
Earnings per unit - basic and diluted (in dollars per share) | $ 0.11 | $ 0.12 | $ 0.09 | $ 0.06 | $ 0.07 | $ 0.10 | $ 0.10 | $ 0.03 | $ 0.04 | $ 0.09 | $ 0.10 | $ 0.05 | $ 0.38 | $ 0.29 | $ 0.27
Antidilutive shares and LTIP units (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 800,746 | 706,865 | 631,251

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