Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Restricted Stock Units (Details)

v3.7.0.1
Stock-Based Compensation - Restricted Stock Units (Details) - Restricted Stock Units - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Number of Awards      
Awards outstanding, beginning balance (in shares) 637,898 616,394 500,928
Issued (in shares) 504,647 339,280 257,030
Vested and restriction lapsed (in shares) (249,356) (295,089) (124,906)
Forfeited (in shares) (33,938) (22,687) (16,658)
Awards outstanding, ending balance (in shares) 859,251 637,898 616,394
Weighted Average Issue Price (in dollars per share)      
Awards outstanding - beginning balance (in dollars per share) $ 12.87 $ 15.00 $ 15.81
Issued (in dollars per share) 9.07 9.34 10.97
Vested and restriction lapsed (in dollars per share) 9.77 9.36 10.42
Forfeited (in dollars per share) 8.15 10.56 10.95
Awards outstanding - ending balance (in dollars per share) $ 11.73 $ 12.87 $ 15.00