Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - PSA Valuation Assumptions (Details)

v3.20.1
Stock-Based Compensation - PSA Valuation Assumptions (Details) - 2016 LTIP Plan - Performance Share Awards (PSAs)
12 Months Ended
Dec. 31, 2017
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Grant date stock price (in dollars per share) $ 15.41
Risk-free rate of return 1.60%
Expected volatility 31.40%
Expected term (in years) 3 years
Dividend yield 0.00%