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Compensation (Tables) | 3 Months Ended
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Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Activity Associated with Limited Partnership Units | A summary of the activity associated with limited partnership units is as follows:
|  | Number of Units |
Balance at December 31, 2017 |  |  | 123,631,195 |
Granted |  |  | 11,343,446 |
Redeemed/exchanged units |  |  | (5,629,072 | )
Forfeited units |  |  | (38,689 | )
Balance at March 31, 2018 |  |  | 129,306,880 |
Activity Associated with Restricted Stock Units | A summary of the activity associated with RSUs is as follows:
|  | Restricted Stock Units |  |  | Weighted- Average Grant Date Fair Value |  |  | Weighted- Average Remaining Contractual Term (Years) |
Balance at December 31, 2017 |  |  | 1,409,747 |  |  | $ | 8.76 |  |  |  | 1.68 |
Granted |  |  | 51,976 |  |  |  | 12.10 |  |  |  |  |
Delivered units |  |  | (413,051 | ) |  |  | 8.44 |  |  |  |  |
Forfeited units |  |  | (29,572 | ) |  |  | 9.65 |  |  |  |  |
Balance at March 31, 2018 |  |  | 1,019,100 |  |  | $ | 9.03 |  |  |  | 1.69 |

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- Definition Tabular disclosure for share-based compensation plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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