Equity Transactions Share Repurchases (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended						72 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2019
Accelerated Share Repurchases [Line Items]
Stock repurchased during period (in shares)							11,241
Stock repurchased during period							$ 628,187
2014 Repurchase Program
Accelerated Share Repurchases [Line Items]
Stock repurchased during period (in shares)	2,962	1,478	107	1,304	1,836	3,554
Stock repurchased during period	$ 196,269	$ 110,505	$ 7,693	$ 64,685	$ 96,410	$ 152,625