Stockholders' Equity - Repurchase Program (Details) - USD ($) $ in Thousands	3 Months Ended						68 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Jul. 27, 2021
Class of Stock [Line Items]
Shares repurchased	$ 405,692	$ 246,203	$ 170,382	$ 238,396	$ 32,230	$ 530,237
Program
Class of Stock [Line Items]
Shares repurchased (in shares)							17,742,577
Shares repurchased							$ 3,900,000
Remaining authorized repurchase amount	$ 1,200,000						$ 1,200,000
Program | Common Stock
Class of Stock [Line Items]
Increase in authorized amount to be repurchased								$ 1,000,000
Stock repurchase program, approved amount								$ 5,100,000