Goodwill and Other Intangible Assets (Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Goodwill [Roll Forward]
Balance at beginning of period	$ 452,390	$ 497,267	$ 452,390	$ 497,267
Changes during the period from: other	0	0	0	0
Balance at end of period	$ 452,390	$ 497,267	$ 452,390	$ 497,267