Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.6.0.2
Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2016
Dec. 31, 2015
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 160,000,000 160,000,000
Common stock, shares issued 70,871,902 70,354,608
Common stock, shares outstanding 70,871,902 70,354,608