Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Stock Based Compensation - Nonvested (Details)

v3.6.0.2
Stockholders' Equity and Stock Based Compensation - Nonvested (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
General and Administrative Expense      
Weighted Average Grant Date Fair Value      
Share-based compensation cost $ 1.7 $ 1.2 $ 1.3
2006 Plan and 2012 Plan | Restricted stock      
Shares      
Nonvested shares at the beginning of the period 123,329 162,609 199,550
Granted (in shares) 171,252 44,000 98,689
Vested (in shares) (101,333) (78,815) (101,143)
Forfeited (in shares) (7,167) (4,465) (34,487)
Nonvested shares at the end of the period 186,081 123,329 162,609
Weighted Average Grant Date Fair Value      
Nonvested shares at the beginning of period (in dollars per share) $ 16.34 $ 12.02 $ 12.02
Granted (in dollars per share) 17.03 14.99 16.03
Vested (in dollars per share) 14.57 13.64 11.94
Forfeited (in dollars per share) 15.98 12.80 11.62
Nonvested shares at the end of period (in dollars per share) $ 15.58 $ 16.34 $ 12.02
Unrecognized compensation cost (in dollars) $ 2.9    
Weighted average period for recognition of unrecognized compensation cost 3 years 3 months 18 days