XML 80 R66.htm IDEA: XBRL DOCUMENT v3.6.0.2
Stock-Based Compensation - Non-vested Shares (Details)
shares in Thousands
 12 Months Ended
Dec. 31, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Non-vested shares at beginning of year (in shares) | shares 955
Granted (in shares) | shares 36
Vested (in shares) | shares (299)
Forfeited (in shares) | shares (192)
Non-vested shares at beginning of year (in shares) | shares 500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]  
Non-vested shares at beginning of year (in usd per share) | $ / shares $ 4.88
Granted (in usd per share) | $ / shares 24.34
Vested (in usd per share) | $ / shares 2.64
Forfeited (in usd per share) | $ / shares 5.99
Non-vested shares at beginning of year (in usd per share) | $ / shares $ 7.19