Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Tax Years that Remain Open and Subject to Examination by The Tax Authorities (Details)

v3.8.0.1
Income Taxes - Summary of Tax Years that Remain Open and Subject to Examination by The Tax Authorities (Details)
12 Months Ended
Dec. 31, 2017
U.S. Federal | Earliest Tax Year  
Income Tax Contingency [Line Items]  
Open Tax Year 2014
U.S. Federal | Latest Tax Year  
Income Tax Contingency [Line Items]  
Open Tax Year 2017
State | Earliest Tax Year  
Income Tax Contingency [Line Items]  
Open Tax Year 2013
State | Latest Tax Year  
Income Tax Contingency [Line Items]  
Open Tax Year 2017