Annual report pursuant to Section 13 and 15(d)

Earnings per Share - Reconciliation from Basic to Diluted Weighted Average Shares Outstanding (Details)

v3.8.0.1
Earnings per Share - Reconciliation from Basic to Diluted Weighted Average Shares Outstanding (Details) - shares
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Earnings Per Share [Abstract]                      
Weighted average shares outstanding – Basic (shares) 133,138,140 104,096,837 104,015,815 103,947,888 103,947,888 103,783,719 77,842,216 22,694,161 111,299,670 78,016,005 22,615,787
Dilutive effect of unvested common shares with service conditions and assumed stock option exercises and conversions (shares)                 369,367 0 0
Weighted average shares outstanding – Diluted (shares) 133,895,646 104,096,837 104,015,815 103,947,888 103,947,888 103,783,719 77,842,216 22,694,161 111,669,037 78,016,005 22,615,787