v3.19.1
Income Taxes - Reconciliation of Effective Interest Rate (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Statutory federal tax rate 21.00% 35.00% 35.00%
State franchise tax, net of federal tax benefit 8.48% 6.90% 6.94%
Share-based compensation 0.24% 0.49% 0.66%
Remeasurement from the Tax Cuts and Jobs Act 0.07% 5.17% 0.00%
Other items, net 0.27% 0.10% 0.02%
Effective income tax rate 30.06% 47.66% 42.62%