XML 65 R53.htm IDEA: XBRL DOCUMENT v3.7.0.1
Earnings Per Share: Earnings Per Share Reconciliation (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share [Abstract]        
Net income (loss) available for common stock $ 22,195 $ 669 $ 98,718 $ 40,671
Weighted average shares - basic (in shares) 53,229 51,514 53,191 51,279
Dilutive effect of:        
Equity Units (in shares) 1,977 1,362 1,796 1,068
Equity compensation (in shares) 178 110 192 107
Weighted average shares - diluted (in shares) 55,384 52,986 55,179 52,454