Earnings Per Common Share (EPS) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill, Impairment Loss	$ 0	$ 379,863	$ 0	$ 379,863	$ 0
Net income (loss)	$ 26,721		$ 25,436	$ (283,996)	$ 42,390
Earnings Per Share, Diluted	$ 0.38		$ 0.42	$ (6.01)	$ 0.68
Scenario Unfavorable Adjustment [Member]
Net income (loss)				$ 329,500
Earnings Per Share, Diluted				$ 6.56