Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of The Statutory Federal Rate and The Company's Effective Tax Rate (Details)

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Income Taxes - Reconciliation of The Statutory Federal Rate and The Company's Effective Tax Rate (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Tax provision (benefit) at federal statutory rate (21.00%) (21.00%) (34.00%)
State income taxes, net of federal benefit (0.97%) 0.32% 1.94%
Effect of noncontrolling and redeemable noncontrolling interests 21.95% 24.01% 51.03%
Stock-based compensation (1.96%) (1.77%) 0.70%
ASC 740-10 Reserve (0.11%) 0.00% 0.00%
Tax credits (0.99%) (1.35%) (1.25%)
Effect of rate change 0.00% 0.00% (15.93%)
Effect of valuation allowance 0.40% 3.04% 0.81%
Other 0.62% 0.47% 1.20%
Total (2.06%) 3.72% 4.50%