XML 66 R51.htm IDEA: XBRL DOCUMENT v3.6.0.2
Earnings Per Share - Calculation of EPS (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Numerator:                      
Net income $ 23,906 $ 29,937 $ 44,175 $ 16,778 $ 25,703 $ 24,464 $ 24,822 $ 10,641 $ 114,796 $ 85,630 $ 163,377
Denominator:                      
Weighted-average number of common shares outstanding—basic                 201,079,573 200,796,678 195,943,813
Effect of dilutive securities:                      
Unvested restricted common stock                 47,468 129,640 181,310
Shares related to unvested PSUs                 549,217 533,092 556,763
Unexercised stock appreciation rights                 0 524 1,095
Weighted-average number of common shares outstanding—diluted                 201,676,258 201,459,934 196,682,981
Basic earnings per share (in dollars per share) $ 0.12 $ 0.15 $ 0.22 $ 0.08 $ 0.14 $ 0.12 $ 0.12 $ 0.05 $ 0.57 $ 0.43 $ 0.83
Diluted earnings per share (in dollars per share) $ 0.12 $ 0.15 $ 0.22 $ 0.08 $ 0.14 $ 0.12 $ 0.12 $ 0.05 $ 0.57 $ 0.43 $ 0.83
Stock Appreciation Rights (SARs)                      
Earnings Per Share [Line Items]                      
Antidilutive securities excluded from computation of earnings per share, amount                 20,770