XML 64 R48.htm IDEA: XBRL DOCUMENT v3.6.0.2
Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ 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
Earnings Per Share [Abstract]                      
Net income $ 9,520 $ 14,065 $ 9,713 $ 32,693 $ 6,339 $ 11,950 $ 7,314 $ 13,787 $ 65,991 $ 39,390 $ 28,004
Less distributed and undistributed earnings allocated to participating securities                 1,496 981 2,002
Net income allocated to common shares                 $ 64,495 $ 38,409 $ 26,002
Weighted average common shares outstanding                 20,834 24,308 24,708
Incremental shares from assumed conversions of common stock options and LTIP awards                 47 7 4
Adjusted weighted average common shares outstanding                 20,881 24,315 24,712
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect                 0 0 4
Special dividend, per share                     $ 2.00
EPS impact under two class method of dividends exceeding earnings                     $ 0.05