Share-Based Compensation and Cash-Based Incentive Compensation - Schedule of Outstanding Restricted Stock Units Issued to Eligible Employees (Details) - Restricted Stock Units (RSUs) - shares	Sep. 30, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards expected to vest by period	7,535,311	6,107,248
2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards expected to vest by period	2,087,768
2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards expected to vest by period	3,443,731
2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards expected to vest by period	2,003,812