Annual report pursuant to Section 13 and 15(d)

Stock Compensation - Number and Weighted-average Grant Date Fair Value of Restricted Stock Grants (Details)

v3.3.1.900
Stock Compensation - Number and Weighted-average Grant Date Fair Value of Restricted Stock Grants (Details) - Restricted Stock
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Options (in shares)  
Outstanding at beginning of period | shares 708,658
Granted | shares 443,710
Vested | shares (361,814)
Forfeited | shares (20,607)
Outstanding at end of period | shares 769,947
Weighted Average Grant-Date Fair Value (in dollars per share)  
Balance at beginning of period | $ / shares $ 21.01
Granted | $ / shares 33.57
Vested | $ / shares 22.72
Forfeited | $ / shares 33.85
Balance at end of period | $ / shares $ 29.22